Please urgently help.

My name is Mr Heymann my cellc simcard got damage the 3 months back did not get chance to buy a un ricca sim card bougth one called the call centre four times they keep on saying IO have failed the authenication.Which does not make sense they are speaking to the different call centre people who are unhelpful. There is three opt number-435834,385656,161654.Mu number which needs to be ricca-***.There is no help no one is even trying to asssit.The customer service is very poor still paying a contract which I dont use.I would also like them to replace the contract and refund my airtime.