Vodacom and Vodacom Repair center: HELP??

I have never in my life been treated as bad as Vodacom Westgate branch treated me. About a month ago (end January) My Whats app Voice note stopped working. I tested the Voice recorder app and also the voice recorder on FB. Not one functional. The phone in question is a Samsung A35. The technician in the Westgate repair center, Tatho - as in the past - Did not look as if he wanted to assist. Not one eye contact he spews into my direction that I have to backup all data. I did and two weeks later arrives at Westgate (Roodepoort). After waiting about ten minutes to be helped, I was directed to Thato. Again - really with no effort to help... after explaining my problem, he says (and yet no interest in helping the client, that this is a app mistake and I should patiently wait for an update form Whats app. Such bull. The more I explain that other recorders on the phone is not functional - he then says: Go to Samsung Clear Water. I did. Then - they say they can help me but I need prove of purchase (bare in mind that this is a contract phone) . Needles to say - Westgate failed to mention this - as I was just a drag to serve. After a few attempts I returned to Westgate. Thato - refuses to help. The manager - did not even make an effort - which I learnt later sat in the conversation. Not much of a manager. He then - after a lot of anger - decided he will make an effort to submit my phone, No insurance forms to be filled in. Nothing. Eventually I left. Received messages that phone is in for repairs. Today (bit more that a week later) - I received the device is there. NO other communication. (I kind of doubt if this is even submitted). After work stopped at Westgate center. Stood there 5 minutes (the shop is empty) before someone decided to maybe look my way. The above mentioned manager staring at me. The phone is given, a paper to sign thrown on the table. Nothing said. And - the phone is still dysfunctional. NO explanation. This is so rude and really the worst service I have received... from the word go. I PLEAD for action towards Westgate Repair Centre, the manager and Thato - and need to be updated on this..... and someone that wants to help me... "Hey, sir. It can not be fixed, but I see that you are on contract (for more 20 years... can we maybe replace the phone? Or at least some communication. I am in so much despair and anger.... What am I to do?