Atrocious Internet

I recently signed up with TRUSC, for the first few months we had no issues with our internet, but then all of a sudden our internet drops multiple times through the day. After numerous emails of getting them to sort this issue, one of their technicians came out evaluated our set up and said that the issue is not on our side, TRUSC said the issue is with us. Two months after still have the same issue and because they have a contract with the complex we live they are the only provider we can use.