Bad service

Good day

I recently took up a contract with Telkom on 40+40 package. It took Telkom One month to deliver my sim after numerous attempts from Courier IT stating that they cannot find me whereas I didn’t get a call from them and at the 1st call they the delivery guy said he is on his way but didn’t pitch. Anyway long story short, I did get my sim that was supposed to delivered. Then called and informed the sales team and that point of time I was dealing with Nelder Ndlovu after a friend had referred me to her. I was told the sim was returned so they re-apply for another one fine.Today I get a sms stating I will be debited 596 l, I call Telkom and they said I have two sims whereas I got one sim about 3 weeks back. Now they are referring me back to sales. The question is how do I pay for something I didn’t get nor use? Could this be resolved