Boostin SA - Charged for service not done.

I purchased a Subaru Impreza WRX in March 2020 that had just been serviced by Boostin SA for R4800. The seller handed me the invoice as well as the proof of payment. Having been in the motor trade for 29 years , I was quite interested to see charges of R1200 to 'set water pipes' and R650 to set front brakes. Neither make any sense as you cannot 'set' either. The biggest surprise was when the engine went 300 kms later on the way from Gauteng to Cape Town and I discovered that the engine was never serviced. The oil , oil filter , spark plugs, coolant was all well over 20 000 kilometres old if not more. I have contacted Boostin SA on two different occasions to get their opinion of the situation , but they are choosing to ignore me. I have now had to do a full engine rebuild. I am busy with legal proceedings. If you are planning to have your vehicle serviced at Boostin SA ..... MAKE SURE TO CHECK THAT IT HAS BEEN DONE !