Continuous bad service

I have previously complained about MTN, but unfortunately it wasn't to be the last! After having to drive nearly 80km's 5 times due to the faulty handsets I have received I was informed yesterday that due diligence wasn't performed on my behalf regarding my requests. I was informed of compensation for all my effort having to return the handsets & even having been without a phone for 2 days. I have received bad service from MTN as blatantly as staff members pointing to another to put a screen guard on my phone which I was informed by a staff member that I may have done there regardless the purchase was not there. I am also still waiting since 01/12/2015 for my airtime to be re-imbursed as I lost it in my upgrade which I had been advised was not going to happen. Network providers have become complacent in the fact that it's a mission to cancel contracts then move between service providers & therefore treat customers as they see fit. Yesterday I was informed that I am a difficult customer which clearly states I have been discussed. I don't have time for their in-house politics, if demanding staff comply with what they've agreed to do - so be it, I am gladly a difficult customer