3 weeks little response

3 weeks i have gotten a mail from afrihost twice to say connection looks fine try again, once logged a call to Telkom which was closed. I have since communicated with Telkom myself and line reporting 12mb connection but still constantly being disconnected. Been mailing Afrihost almost every night for reply and got nothing.... I'm now at the point where i dont know how to proceed. We are paying for Afrihost to manage the line and its not being done.