I purchased a VW Amarok Bakkie from Weelee, but now they don't want to assist

I purchased a VW Amarok Bakkie from Weelee, and it was due for a service. Weelee arranged for the service, but on the day of collection, I discovered a massive oil leak. Weelee sent the bakkie back to the initial service provider, who then determined it needed repairs beyond their capability and forwarded it to VW Hatfield.

It's baffling how a vehicle can be returned with such an issue immediately after a service. After the bakkie was supposedly fixed and delivered to me, I noticed one or two drops of oil under it within a day or two. I contacted a representative from VW Hatfield, who advised me to drive the bakkie for a week or two, suggesting it might be residual oil from the previous leak.

After the advised period, I took the bakkie back to VW Hatfield. They confirmed there was still an oil leak that needed fixing. The VW Hatfield representative contacted the original service provider and Weelee, but Weelee refused to cover the repair costs, claiming it was a new oil leak. Essentially, I have yet to receive a bakkie that is free from oil leaks.

I refuse to take the bakkie back to the initial service provider because I cannot understand how a serviced vehicle could be returned with such a significant oil leak. When the bakkie was test-driven, there was no oil leak.