UBER EATS deducted all the money from my credit card on one day 10 transactions

Uber Eats deducted 10 transaction on my credit card on one day. They empty my credit card. I cant phone them. They dont have an email address. This is a ghost company with drivers and someone in the compay that do ***** and you cant held them accountable. I do see now a lot of complaints on the internet and on social media. I just want my R3065 back that they too of my credit card. I am a pensioner and that was all my money for the rest of the month. I would also like to know why do Visa allow Uber Eats to make use of the card and allow them to commit *****. If someone can tell me what road must I take to report this and get my money back