Unpleasant service

We've had a contract with Vodacom for over 5 years this year I decided to upgrade and bought honor device also insured the devices it broke down took it to repairs within few months to my surprise they brought it back claiming that I wasn't using the same simcard to my surprise one of the contract simcard was used on that device what kind of gibberish is that I'm paying over 1.7k monthly they failed to fix my device or give me the new device I'm disappointed and utterly disgusted by their service