Agent Complain...this is affecting my credit score

I app**** for a contract phone then the agent made me a deal for simcard contract...i cancelled it within a week seeing that am not recieving my phone,then the second agent who helped me from cancellation department clased my account wrong as if i ddnt wanna pay them the outstanding airtime used and handed me over to the lawyers ...its weird because am new n didn't take even two weeks been their customer via contract...am not happy coz this is now affecting my credit score am not behind with nothing this started when i started to take Vodacom product..i am not happy with everything the cost me coz i made it clear al pay cancellation fee n outstanding airtime to the agend😭😭please help me