Telkom disgusting customer service

Telkom Cresta provided us with TWO faulty Huawei phones within the 7 day period they allocate for customers to bring in faulty new phones for replacements. Upon inquiring if we could replace the Huawei with a Samsung of the same specs, package and price, we were accused by the branch manager of their Cresta store to be ***** who were only doing this because we decided we had wanted the Samsung instead of the Huawei. Like we would go through all of this drama for fun! We simply need a reliable phone! And the branch manager accusing us of ***** in front of a store full of customers? DISGUSTING UNPROFESSIONAL behaviour and atrocious "customer service". A big corporate who is so desperate for money that they treat good, honest customers like ******* because they cannot do the honorable thing...