I went to the westwood (Westville)branch in Durban and was helped to upgrade my contract the consultant was quick and efficient

I went to the westwood (Westville)branch in Durban and was helped to upgrade my contract the consultant was quick and efficient. I was told that a voucher comes with my contract after 4 days i still didn't receive the sms with the voucher, i emailed, called and WhatsApped the store with little to no assistance from them. Why offer a client a service if you cannot provide an after service