Angry customer

I have reported a problem with my internet that I pay for every month forvthe last yearr and a half. Have about 20 reference numbers. No response, Always the technical department that will contact me. The technical department contacted me twice, They will always come back to me, but then I never hear from them again. They gave put up a outside router about e and s half years ago. It was working fine for a year. Now I have internet and then nothing. They keep on telling me tgat they will give me credit, That never happens. Is this what I paying for????? No service!!!!