Bad service

Went to telkom forest hill on sunday 06/03. Took out a contract. After all paper work i was told there is no stock. I changed my contract for a different modem. There was no stock of that one either. He told me that on monday 07/03 the stock will arrive. I told him i will take it from reds mall because it is closer. But he said no stock in reds mall and no stock arrived on monday.. he will only get it by friday 11/03. He never phones me i have to keep phoning and smsing him. Forest hill, reds mall and centurion never answer the phone. Why does a telephone company have telephones if they dont answer. Rather take the phones out.. they are totally useless. 2 weeks ago i phoned forest hill and they never had stock. Why dont they keep stock? Its called customer service.