Alliance — slow internet from alliance

Address:

30A, Taltala Bazaar Street, kolkata 14

Till now my issue isn't fixed yet
I'm still getting very slow speed and now it's down to 5 mbps
Also i tried calling in their office, the person was very rude and even said they won't fix it because we are not using "optical fiber"
The issue continue to persist and i'm getting frequent request time out

If this goes on i'm not going to recharge from next month

My id is zayeem_mb
See to this asap please