Bad service and make me feel like I'm stupid

Good day My name is petunia mkhondo my contact is ***.i worst experience at Ackermans is I bought a mobicel star lats year December,it has it fault within a week ,I took it back and they promised that it will be fixed within 21 days,I waited for their sms until I went there myself,the gave another broken phone the IMEI they were not corresponding,it was worse than the one I bought ,it was not working instead it was very hot,they took it back,after two week I went ther to check my phone ,the very rude male supervisor told me that the phone is still in the shop and I should complain to Vodacom not them,or I should report to where I can get help,I bought a new phone they havey phone, yesterday I went there he lauy at me and told me that my phone is not here,I called their head office 4 times they hang up on me,I owne a small business and by phone a making a living out of it ,plus help me I just need my money back cos I had to borrow money to get another phone Ackermans phone is ***. Thank u