My reply to another forumer.
After my own experience with maxis earlier which i documented on the forum, my mum also encountered the exorbitant ECP charges.
This is the course of action that I took:
First go to the maxis centre and complain. Throw a tantrum. Cause a scene. Make sure everyone there can hear you. Do not be ashamed. do not let them get away with charging you anymore. More often than not, a few of the other people sitting there are also facing the same RM5 SMSes ECP Crap. Gang up.
DEMAND that all the charges are reversed or you are moving your account to another telco. And you would be forwarding this issue to the MCMC.
They at maxis will tell you that they are not responsible for charging you for those ECP SMSes, to which my response would be, "In that case, why should i pay maxis then since it is these ECPs i owe the service to." They would then ask you to contact these ECPs. I asked them to give me their contact numbers. Then and there i made a call to MacroK. It was some automatic voice answering crap. Then i complained to maxis how does one get in contact when nobody picks up. and they would give you a separate number to call. I called and one guy answered. I asked him to reverse all the charges, he said they will stop FUTURE SMSes but cannot reverse the payments. i asked for his name (i cannot remember what his name is now) and said that i would like to quote him in my report to MCMC. He gave me his email and asked me to forward scanned maxis bills to him and he would look into the matter. I NEVER heard from him.
In the end. I still owed MAXIS RM300+ worth of ECP crap. I refused to pay. Maxis terminated her phone services but CONTINUED to charge the RM30 month fees. Do not be afraid. IGNORE it. They would then send threatening letters from supposed debt collection co. (from fancy legal sounding company names like Ibrahim & co. etc). IGNORE THESE LETTERS. They would continue sending more letters and ALSO call your home phone, other mobile phone contact etc to threaten you to pay. IGNORE. [It is at this point, that you use your discretion to abuse them verbally. I did

]
In the end, after months of harassing letters and phone calls, Maxis gave up
You should make a copy of your dad's bill, and send it to MCMC, CC to maxis.
ECP preys on the UN-technically savvy people. and the MCMC is useless. My advice is DON'T PAY. Maxis can threaten, but they don't go through with it. Hold your ground.
I posted it here for the benefit of those also facing the same nonchalant response from Maxis.