I have exactly the same issues.
Went to Singapore for 11 days and was charged with RM494 for data roaming which I didn't use.

The officer said "when you use wifi on your phone, it tend to trigger the data roaming and as long as you're using it we'll charge RM38/day."
And other officers said "Maybe you accidentally turned it on" as if we don't know how to turn off.

That's the weirdest claims I heard. I've file complaint to Celcom and they said they investigated and it is valid and close my case.

When CFM is involved, all telcos will work fast. Haha

When CFM is involved, all telcos will work fast. Haha

Hi,

Here is my story.

My parents went to China last week. While I am dead sure that the "Data roaming" option on his Galaxy Note 4 is turned off, few days after his vacation he received this:

[attachmentid=6354968]

And soon he hit his credit limit and his line was barred.

After he returned to Malaysia I called up Celcom careline to find out what went wrong, the answer I got was "sorry, this month's bill still not yet generated. You have to wait till the bill cycle". (What the hell.....) Fine, i'll wait.

So, bill came, and I saw this:

[attachmentid=6354995]

GREAT! So I lodged a complaint via their customer self service portal. 2 days later this is what I got:

[attachmentid=6355014]

So, I called 1111 to follow up on the case number to only find out that the case was actually already closed without further notice/discussion!
Immediately I requested the agent to file an appeal for me over the weekend, and today I login again into customer self care portal and it's again, closed without contacting me or any response:

[attachmentid=6355049]
[attachmentid=6355156]

To further "convince" myself, I traveled to Stulang Laut, Johor Bahru and did this:

https://www.youtube.com/watch?v=jK1tVJiT26g

Basically what I did was after making sure data roaming is turned off, I connect to one of the so called "celcom roaming partner"'s network and tried to fool around before switching back to home network. The result?

[attachmentid=6355099]

And, it seems that I'm not the only victim
http://www.complaintboard.com/celcom-l2392.html

and L Ng quoted an example of this happening (http://www.iphoneincanada.ca/carriers/rogers/fido-charging-iphone-data-roaming-setting-off/) and the Telco operator admitted its their fault and made a refund.

The next experiment I'd probably do is connect to CELCOM ROAMING PARTNER and this time, even with "cellular data" turn off before I turn to MCMC for help...
UPDATE 12/4/2016 5:15pm
Wrote to CFM and in less than an hour after i furbished CFM with all the details:

RM0 RM144 rebate has been approved and will be reflected in ur next month's Celcom bill. Stay connected on the fastest network. TQ

BRAVO CFM!
UPDATE 15/4/2016
As advised by grazy, i tried again at the same spot, same roaming partner, local data on, but network "3G or below" only, and VOILA! no charge.

Obviously Celcom needs to fix this shit ASAP.

Adam, who is CFM and how do I contact them?

I have an issue with YES, they are cheating me big time on quota.

I have been reading that many others are having the same problem, and I would like to lodge a complaint with a regulatory body

494 is exactly 38 x 13days.
Maybe the extra 2days are arrival date till 11.59pm charge 1 day then the departure date after 12.00 am another day.

Did you turn off the 3 settings ie 1) mobile data, 2) data roaming and 3) voicemail service before entering Singapore ?

Totally off everything....

I have seen at least 3 threads complaining about the same problem already. Celcom must do something to prevent force usage of data roaming when customer is not prepared to use it.

my mom using celcom too. i bring along her to travel at taiwan
but she didnt have the issue as you. wonder is it randomly or what? lol