Vodacom Vaal Mall's utterly bad service

Hi all. Please don't use Vodacom Vaal Mall for anything, as they are *********** in serving their customers. For years now I've been at Vodacom and only had good things to say about their service. But now I'm starting to think twice about that. 15 December 2018 i handed my Sony Experia XA1 Ultra in for repairs. The ear speaker is faulty and the Auxi****y port to listen to music is faulty ass well. I've been at Vodacom Vaal Mall four times from the 15th December untill now, and everytime they give a different excuse as to why it's not repaired yet. Yesterday the 11th January 2019 the latest excuses is that i handed it in too late in the year for them to order any spares for the phone. Second of all, apparently they don't keep spares on hand for the phone as it doesn't break, but why can't they order spares for the phone? Everytime it's just a waist of my time to go in and inquire if there's any progress made. They don't even have the courtesy to send even a sms to say we are still busy with the phone or whatever the case may be. I even spoke to the Manager of the repair side and she was as helpfull as a Bull in a China shop. So what am i to do next, as I'm out of options at this stage. I work out of the Country alot and rely on Video Calling to talk to my family and at this stage i can't do none of that as Vodacom Vaal Mall are *********** in performing their duties.