Shocking service from Honda Fury Pmb

I bought a demo/used Honda Jazz at the end of March 2021. I went through two sales people at the branch in the space of a week. Handover was done at Fury Ptn as I couldn't drive to PMB. The initial sales invoice had the incorrect mileage. They had it listed at a lower mileage, which is how it was advertised. Handover was rushed, their finance person was off at month end, I had to rely on the finance person at Fury Ptn to assist where possible. It took me 2 weeks to get it amended. I had to go to the dealer principle who only called back as I threatened to escalate the matter. I have waited since then for my new registration. I was eventually called back to tell me the COR had expired. I discussed arrangements and it's now been two weeks. The entire process has been painful due to shocking service and poor management.