********** use of my credit card

I woke up today in Worcester in South Africa to discover 5 smse on my phone notifying me that my credit card has been used in the UK. I immediately phoned to stop my card. I was told someone would phone me and give me a case number. That did not happen and I phoned them again and was given the 011 ***** line number. That is where my trouble started. VERY rude lady who told me I have to wait 3 working days for them to investigate. When I asked her how do I know whether my card has indeed been blocked and how is further use stopped, I was told they are busy and I can order another card. I was put through to the section for new cards. I do not want a new card. I want: 1. To block my card 2. Get the assurance that it cannot be used again 3. Be assured that other cards linked to my credit card is safe 4. When do I get a case number 5. What is the process now 6. When do I get a refund 7. What is the process going forward?

I have been a client since 1978 and this is the service I get?