Shameful service

I bought a vehicle cash from them, received papers for the car, then changed ownership to my name. But when I went to renew the licence disc, was told at the Post Office that the disc had been renewed already and should contact the business where I'd bought the car.

It's been a nightmare trying to get them to resolve the issue, as I urgently require the disc. Received a case number from them, but I mostly either get ignored or the matter is "escalated". It's been nearly two weeks.

Such a shame, as I've enjoyed a great customer experience from them before on other matters.