Misleading SLA from Pep cell and Mobicell

On the 8th Oct 2021 i returned a cellphone which had a fault and was told it will take 4 weeks to fix it.I went to fetched it on the 28th and I found out that it still had the same problem. Though it was given back to me claiming it's fixed. On their slip it states they will fix the phone and if not they will replace it. Mind you this is a business phone and my business is suffering because of their misleading and incompetence. No calls received from them at all even a reply on my 1st review with them.