Stylo horizon

Good day, I would like to lodge a complaint regarding a phone I purchased from Pep. In April last year, I bought a Stylo Horizon cellphone from Pep. The phone has already been taken in for repairs twice while still under warranty. Unfortunately, the phone has now stopped working again for the third time. Yesterday I went back to the Pep store to return the phone for repairs because the warranty has not expired yet. However, the store manager refused to assist me and said they cannot take the phone again because it would be the third repair. I believe this is very unfair because the repeated faults are not my fault, and the product is still under warranty. I am a UNISA student and I rely heavily on my phone for my studies because I study online. Due to Pep refusing to assist me, I was forced to borrow money and buy another phone yesterday because I cannot stay without a phone for more than two days. This situation has caused me unnecessary financial stress because I had a phone already, but I had to buy another one due to Pep's refusal to honour the warranty. I would like Pep to take responsibility and provide a proper solution, either by replacing the faulty phone or addressing the costs I had to incur because of their refusal to assist me while the product is still under warranty. I hope this matter can be resolved as soon as possible. Kind regards Swazi Mkhize