Faulty Headset

Took a contract cellphone with Cell C on the 23rd August 2015,Started experiencing problems with the headset in the Month of September which deemed to be a factory fault the headset froze & sets off the alarm every minute then i sent it the first time for repairs.....It came back a month later where in the month of November the same problem transpired which left me without a cellphone the whole of December....Called the customer care department with this regard & the consultants are all rude.....The cellphone was sent back saying i need to book the headset the third time where i would be assisted......Now the same problem transpired the third time now & i cannot be billed for a product that i am not satisfied with.....Spoke to the repairs center department requested they send a new headset or of the same value but the response was not good....I heave ran out of options now hence the debit order is extracted every month....May I please be assisted with this query......Nothing has been resolved yet,tried communicating with Mpho Ndlovu via email but she is not respondent...My alternative contact details *** Please assist once more.... <br> Regards Yanga Molots