guys, finally managed to talk to UniFi ppl..
here's the answers so far that i gotten:

if u hit daily bandwidth cap, ur speed will be capped to 1M

if u hit the bandwidth cap and still want to continue using full speed, u need to pay extra charges to get it, and the extra charges will be calculated based on the extra GB that u have used after the bandwidth limit

Upload is not included in the 60GB limit

for peak hour, it will be 90% speed, and non-peak will be 95%

as for now, u CANNOT get rid of that IPTV package

there might be some other stuff that i asked but forgotten..just ask here, maybe if i did ask and forgot to include here, i'll reply u too
overall, it does sucks, for now...i have made suggestion that cut off IPTV and give cheaper price, and also told her that out of the 100 ppl in this forum, 99 says bandwidth limit too little, and it would be a lot more better if they can increase the bandwidth limit