Poor connection, slow internet and NO after sale service

This company has given us excellent service before we signed up with them. The sales rep offered us better service, faster internet speed, etc. for less than we paid at that stage. The whole process before the contract was signed went smooth with no hassles. We are now 6 month down the line and struggling with poor connection, very low internet speed and no after sale service. They signed us up for a 6 year period after the offered us a month to month no strings attached option. They financed the hardware installed for 10 times the price and we had to take out insurance for the large amount. We are currently paying the same as with previous service provider, but the service is horrendous. No way to get out of this contract and stuck for 6 years. How crazy is that!