Trash service

I bought a cellphone at Ackermans with my store credit. It started having battery issues 4 months later. I took it back to Ackermans on 14 April 2018 with proof of purchase and all its accessories. I was assisted by a Robyn October, she then advised me it would take up to 6 weeks before i can get my phone back. I waited more than 2 months. Last week Tuesday i finally received a call from them saying I must go collect the phone. When i got there it was not fixed. What did I wait for 2 months for if they are saying to me, they made a mistake they will take the phone back for repairs and u must wait for "6 weeks again". Who would stay for that long without a phone. I had to buy another phone because i couldn't wait anymore. So Ackermans you can keep your phone and credit my account with the value of that cellphone. I am very disappointed, even the manager of that store didn't seem to care that i have been inconvenienced