No assistance on old phones

I have a Neotel phone whereby the receiver cord has given up as well as the charger. It seems as if the charger is a fong kong that was purchased in China Town. We have had the phone since 2013 and use it very often. i have been to the fourways branch on numerous occassions now and they always too busy with not enough staff or they just cannot help me. Apparently the phone is too old and they no longer have this make of phone or charger. What do i do now? Shouldnt you at least cater for this? And i dont think the phone is old as i have seen other people being handed this type of phone. Surely a charger can work on this make of phone. The service from your staff is absolutely unprofessional and they have no willingness to check and assist a customer, all they worry about are new customers. What the use getting new customers if you cannot service your existing customer? I would really like Neotel to now replace my phone and charger on their cost due to the amount of time i have spend going in and out of the store. I would appreciate if someone in a management level contacts me now as i am quite tired of going into the store.