Not dhering to CPA day light *******

Took a contract with makro but after 2 days the phone was not charging sent it back and they tested it and confirmed that it was not charging they sent it for OBF and I'm not have been informed that the phone is now charging and they will not authorise credit this is within the 7 days I'm not willing to accept the faulty phone as they are now trying to pass the responsibility to me whose problem will it be if this happen in the month time. I want a new phone or else cancel the contract altogether I can't be taken for ride just imagine 24 moths having a faulty phone. If this is not resolve I'm cancelling the contract with immediate effect.