Very bad customer service

I purchased as willard battery at their branch in President Steyn in Pretoria North, with a warranty of 25 months. The battery gave me some challenges and i took it to them. Left it for a day as advised and they borrowed me a spare one. I returned the following day and only to be informed that my battery had died completely and i will be given a new one once the representative has been consulted. It is almost a week no one called me, I did the follow up only to be told that the battery was over charged so they can’t give the new one, please took the car to the technician and it show charging point is up to standard, now is this the service your commuters to give your clients…? Wyler must just stop misleading utter customers with ur 25 months warranty. It suck’s .