Useless service

A week ago I went to Vodacom in Cresta, upper level. I bought a Huawei, Nova Y9a. I made it very clear from the beginning, that since I have an injury, I have to make use of Uber often. Only later did I discover that this model doesn't support Uber. I've been back 4 times now, and nothing has been resolved. They should either cancel the new contract, or replace it with a model that I can use.