Poor service from NTT and Motorite

I am very disappointed with the service I received from NTT Nissan Potchefstroom. The window wiper motor on my NP200 was broken. I showed the service department what was wrong; they claimed to have repaired it, but a week later, it was faulty again, this time causing the intermittent wiper switch to break as well. I took it back, and they repaired it, but they still did not repair the switch. I have a Motorite 150 000 km full maintenance plan. When I made an appointment for the next service, the 150 000 km service, the vehicle had 149 399 km on the clock. NTT said that they would rather service it one week later, to ensure that the switch is in stock. I informed them that I needed to visit Johannesburg twice before the service appointment, and they assured me that it would not affect the warranty or maintenance plan, as I had another 1 500 km grace period. When I took it for the service, the vehicle had 150 152 km on the clock. I listed a few issues to be repaired, but Motorite refused to repair them because the vehicle had passed the 150000 km threshold. The poor quality of work the first time the vehicle went into the workshop was directly responsible for Motorite declining the repair bill. At the same time, I find Motorite's response very insensitive and not customer-centric at all. They ensured that I would NEVER again buy a Motorite motor plan or service my car at NTT.