Using link3, 2.5mbps, from Sylhet

These past 4-5 days I've been getting high pings in CSGO servers and EU ones in other games. Pings to Singapore are around 250ms and I can't even play casual/matchmaking anymore because my ping is too damn high to any and every server.

Anyone else having problems or is it just me? Anything I can do to fix this? TIA