Unsatisfactory Service-Cellphone contract

On the 13 January i phoned in Cell C informing them to block my sim card and blacklist my phone as i had misplaced it, i then asked what id the procedure to follow when I recovered my device as i was certain it was not lost however misplaced after 3 days i recovered my phone and contacted the call centre for assistance, I was told my sim card is unblocked and that i should visit my nearest Cell C store to fill in an unblacklist form, all that was required to be done from my side was done. and i expected to successfully make use of my device as i was told all is in order and that the turn around time was 24 to 48 hours, however every second day I keep on contacting Cell C as i'm unable to make use of my device that i get debited for every month and it's realy annoying and im tired of consistently having to call Cell C.The last ref number was *** was recieved on the 28th of feb 2015 I spoke Kevin he confirmed my query was loaded and again i should wait 24 to 48 working hours. as far as i'm i feel i should just cancell the contact and take back the device and not be charged penatly fees for the cancellation.