Lack of after sales service

I'm bitterly dissapointed at the lack of after sales service that I am receiving. After purchasing a used vehicle on the 10th May which needed service and a change of brakes,there's been no confirmation of when the service will be done and it's now the 25th June. The worst part is that I have to keep following up with the dealership and keep being promised "next week". The licence discs are still not changed either. The principal Vaughn has not even acknowledged my e-mail complaint and I beleive he is well aware of the matter and just choosing to ignore it.