Disgusting service and behaviour at Vodacom Northgate

On the Easter weekend my fiance and I went to Vodacom Northgate to upgrade her phone, the contract being in my name. We enquired about the iphone XSmax with 128GB memory. The sales person who's name I don't have told us they didn't have stock but he would order it after the Easter weekend and should have it by the following Thursday. He would then call us. First of all, that phone call never happened. Secondly, when I phoned the store on the Friday to find out what's going on I spoke to a different person who then told me that the 128GB iphone XSmax is not available in South Africa, only the 64 and 256GB. So we decided on the 256GB in Gold. Subsequently I went to the Northgate store to do the upgrade and get the phone. The sales person was Calvin. I get a quote of R1100 for the 64GB, and R1200 for the 256GB. I select the 256GB and get told it's not available in Gold so I select Black. I receive a quote via email for R1049. I'm happy as it was cheaper than the original quoted price. So we go through the paperwork and I sign and pay for the upgrade and a cover for the phone. THEN he tells me he misquoted me, as he quoted me for the silver phone, and the black one is R60 more. When I ask why I'm told "that is Apple for you". So I agree, get the phone and go home. Upon unpacking the phone I find that it is not the iphone XSmax I asked for and got quoted for, but the normal iphone XS. I am fuming. The next day my fiance goes back to the store to change the phone, only to find that the sales person Calvin had realised his mistake, but instead of calling and offering to fix it, he tries to manipulate the paperwork to show that he did quote me on the normal XS. Luckily I had the original quote which clearly stated XSmax. It took a further visit to the store and engaging the store manager to get this issue resolved, all the while those people made it out to be our fault and giving my fiance a hard time about exchanging the phone. she had to demand the original paperwork which I had signed and go through it line by line to convince this *********** store manager that we were right and they were wrong. It finally got done, but the lies and bull**** going on in that store are not acceptable. Vodacom is a useless company, but unfortunately the other cell phone providers are no different so as consumers we're between a rock and a hard place if we want a cellphone.