Recent drop in normal speeds

[Kirt142]

I've been using Bittorrent for the past 3 years now and about 2 days ago I've encountered my first problem. My download speed won't go past 200 Kb/s and is usually around 2-30 Kb/s. Before it was (on a well seeded torrent) over 1 Mb/s and maxes out at 1.7 Mb/s. That is usual. I cannot access my current router/modem(it serves as both and my ISP said all have that problem and they're trying to fix it) and when I connect to another router (Ethernet) with port forwarded it solves nothing. My antivirus never caused a problem (AVG) and I'm fairly sure my ISP is not throttling me. I have a 15 Mb/s download and 2 Mb/s upload connection and this has remained true since the problem began. My ISP is Columbus Communications Trinidad and Tobago Limited.