VW Hatfield Pretoria ill logic.

Im commited looking after my new VW vehicle, above and beyond. There are well-known benefits to a vehicle’s engine when doing additional oil changes, for example every half service interval. I asked VW Hatfield to quote me for a paid oil change at 7,500 km. They refused. I made it clear that I was willing to pay; they still refused. I then asked for an explanation and they never responded, despite follow-ups. I went to another VW dealership and had no issues – they sent me a quote within minutes and will be doing the oil change next week. What kind of backwards logic is this?