We ordered dinner and in light of being a club mem...

We ordered dinner and in light of being a club member we were told we would get a 12.5% discount on the meal.
After checking my credit card expenses I saw that I was charged once again for the difference. When I spoke to a receptionist he told me that the discount did not include VAT and the clerk was probably wrong and charged me for the difference without contacting me to settle the matter.
1- I was not told that joy does not include on the VAT
2- Use my credit card without my knowledge ?!
Mistakes happen but requiring a visa without my knowledge is an act he will not do !!
This is not the first time I have been with you and I do not feel comfortable returning there.