Terrible and unacceptable service

I app**** for a Telkom landline and adsl combo deal at the gateway in December. The installation was done by late December however no username and password was issued. The sales agent at the gateway branch informed me that he was unable to assist me and advised me to contact the call centre. I have been trying unsuccessfully to contact the call centre for days and I am unable to get through. This level of service is totally unacceptable. I have been paying for 2 months now and I am unable to use the service I am paying for. Please can this query be treated with the utmost urgency and can an agent contact me with my username and password. I'm terribly disappointed and disillusioned with the service I have received this far.