mtn poor service

sent my samsung tablet for repairs a week later get a quote for R952.94 battery and chargesr faulty, phoned to tell them there is nothing wrong with my charger , i phone requested a new quote im still waiting all of a sudden i get an sms that i must come and collect my device , when i get to MTN it was never fixed it was rejected cause i never accepted the quote. i phone them today to query this and i get attitude and given different no.s to call. the moral of the story is i deserve better service than what im experiencing now and its like im talking to deaf ears having to repeat my story, i pay my contract every month and i have been a loyal customer for years this fustrating cause my device is still under warranty and im not happy please make a plan mtn you come and fetch it from me.