Disgusted with the service

I have had my RCS card for 3 years and I have always been a good player, today I tried to use my card after awhile and it declined even though I was not using it I still kept to my payments. I was so embarrassed when it got declined and I am very upset with the service I am receiving, I phoned the call centre and they kept me on hold for 30 mins and I called 3 times. This is ridiculous service and I refuse to be treated like this as a good player I received no contact to say that my card was going to be blocked and I don't appreciate that happening without letting me know