Connect incompetence has gone too far

I recently got a FNB-connect phone. Since the first day I had issues with it. I have been back to the branch 3 times to resolve issues, but there are still unresolved issues. Each time I wasted more than 2 hours of my time going back to the branch. . I DO NOT want to go back to the branch and waste more time, I rather want to cancel the contract and return the phone. Please send a courier to collect the phone and cancel the contract as soon as possible.