Tablet in for repairs for 2 weeks, and send back unrepaired with NO reason why

I send an tablet in for repairs at Vodacom Repairs Port Elizabeth. It was booked in on the 3rd of March' 22, a week after that on the 10th of March I received an sms that it was booked in, a week after that (Now 2 weeks waiting) I received an sms that it is in for assessment, 10min after that I received an sms that the repair was completed and ready for collection. 1st of all I never ever received a call nor sms what the cost will be to fix the tablet. When I phoned them I was told that the tablet was not repaired. I asked what the reason was and the lady answered me that there was no reason captured on the system. So I waited 2 weeks just to receive a unrepaired tablet back with no reason why. This type of customer service is unacceptable and completely bad.