Frustrated with telkom and finite

I booked my phone in for repair the beginning of July, I called into the finite call centre about 2 weeks later to ask if I can go ahead with payment. Thank goodness I did as there was a mess up with my phone. A phone allegedly mine was sent back to store, I received no communication to say it is there and needed to use my own initiative. I arrived at telkom store and the consultant went to the back and fetched the phone, which turned out not to even be my phone, it's been 2 months, my phone has not been found, everyone is waiting on someone to give an update I am so tired of these issues, I am paying insurance for this type of service. What can I do???