Bad service

I struggled with accesing internet on my phone then called mtn call centre where a call centre agent a whose name i told his team leader(so that she can take action since i complaind but she never got back to me as promised)answered and after holding for so long he told me to hold as he needed to open the system, mind you...he didnt ask me to hold which i failed to understand why he answered the phone if hes not ready. After holding for so long he gets back i told him my problem the guy was so rude along the conversation and he has the bad attitude for someone who works with people, then he tells me what i need to do to enable my internet access then hang up on me. Im so dissapointed in mtn how can he hang up on someone who called for assistance and not done. I decided to change mtn just because of that guy he treated me as if im nothing.