Was with them then started having Router problems

Was with them then started having Router problems. They never came to check in the first 1 mont which in the contract states they needed to do . After 3 year know they are sending collections companies for the money but i had to change internet supplier to keep my company alive . My lawyer sended them a email still no response then i emailed them about 30 times to no avail . Know they want me to pay for service that was not given to me when i needed it . After 3 months my lawyer told me that they breached the contract and he will take it up with them . Still to this day no service no email no team that help . And they are damaging my credit score ...