Both Vimmal and Mr Rham tell the Trotter brothers that they cannot communicate or speak to each other in order to negotiate over the statue because they are both of different castes, but at the start of the episode Mr Rham waits for Vimmal in the car park and they argue with each other.
Del says "I've given him $2,000 for this" but they are talking about Mr Rham. It was Vimmel that Del gave the money to.