Engine and VIN number DO NOT match -

I live in Cape Town and bought a motorbike from Webuycars Midstream, I was assisted by Johan De Vos, The service received wasnt very pleasant,

1. I waited 4 weeks for the registration papers to reach their epping branch, 2. The new battery they fitted was and is completly flat I had too buy a new battery. 3. When we took the bike for roadworthy we discovered the vin number and the engine number, is different, not sure how they let this happened. 4. I phoned their customer service and spoke with Karabo she was going to escalate the matter and provide feedback, I am currently still waiting. 5. I also contacted Johan, but he rejects the calls and isnt very helpful, also promised to get back to me but I am still waiting.

I only buy cars from webuycars because I trust them, this hasnt been a very good experience, I am currently demotivated because, I not getting any feedback and really need this issue resolved?