POOR SERVICE BY VODACOM

I bought an ultra fil screen protector at Vodacom Southgate mall shop L186 for R299.00 on 04 August 2018. The shop app**** the item onto my IPhone X phone screen themself. However I returned it later because it was peeling off (on 28/8/2018). Shop assistant Mavis was busy with another client and asked me to leave the phone with them. When she returned with the phone to my workplace in the same mall, claiming that she fitted a new screen protector , I objected to the bubbles between the item and screen. I obtained a witness’s positive opinion to back me up. Mavis shouted at me as being a drama queen while I was busy with a client. She informed me rudely to wait for 24 hours for it to dry and left. However 24 hours later the problem persisted and I returned my phone to the shop and the store manager promised me a better product that would be ordered from their supplier immediately. This promise was made on 29 August 2018, but a month and two weeks later I am still without a new screen protector. I have been calling at this store ever since , without success while being told by the manager they did not receive the item yet. I am not happy with their explanation and believe that I’m being played for a fool. That store promised me a service they clearly can’t deliver, while they have my money. They also do not refund. Please help. Thank you.