Poor sales service after purchase

Worst experience ever when it comes to service from them. I recently purchased a 2018 Tiguan and just 2 weeks into driving the car, there were significant issues that were raised with the branch and sales agent in WBC Southgate. They advised to send the car to an RMI workshop, which was done. The query was escalated to them for the quotation. This is where everything takes a dip. The sighs from the call center agents who just want to go home, where they just started working. After every interaction, I felt everything slipping through the cracks with the generic response "None of our agents are available and all managers are busy", even after requesting a callback multiple times and having the patience to deal with the frustration of just wanting my vehicle to be resolved. It's giving me really bad anxiety and loss of trust with everyone saying how bad they are, and now feeling that pressure 1st hand. Once you buy the car, everything else is forgotten. You just become another statistic to them. Nothing more, nothing less (Just to add that, their own staff from the branch said I should rather go to Hellopeter)