False advertising

I tried booking my phone last year June at the Menlyn Branch. On the Web they show that they do the batery changing for R299. But they say they cant do that,they need to replace the screen as well. But they said in June 2017 that they can and I need to wait till Jan 2018 to hear if they have stock. After a call to them yesterday I spoke to Omega and he said he will find out. The manager of the branch said they cant replace just the batery for R299,they need to replace the screen as well and it will be R1500. So after they kept me on a line since June and said they can do it and that it is advertised. They now cant change just the batery,but its advertised and they said in June they can,just out of stock. They even let me drove to the Menlyn branch,just to tell me to phone them January. They could not do it over the phone. So now my phone batery is still not done as from June last year and they aperantly cant do it but last year they could and they advertise that they can for R299.