Unable too use my phone

As of the 2nd of march i have been unable too use my phone i paid the amount required on the 8-3-2016 with staff confirming that the phone will be unblocked once the payment reflects still not able too use my phone,i have also completed docs requisting that the contract be transfered into my name this has also not been done that process was started in 2015 its 2016 now,what do i do were do i go to from here im really fed up with them please help.