Bad Service @ Vodacom Chatz

<p>We bought a front screen protector on 7 January 17 for an Sony Xperia X that costs R400 and then the next morning the protector came off and went back to Vodacom Chatz and they gave us a new one but it is also coming off. We asked for a refund but they do not want to help us because we left the slip there as we didn't think we would need it. They do not want to look at the system for a copy. Please help us getting back a refund for poor service. We have never experienced this bad off service with Vodacom. </p>