Blockbuster Video charge my credit card for dvds I didn't rent

Blockbuster Video Store at location 5100 66th Street North, St. Petersburg, FL 33709 (727) 546-3244. I signed up for blockbuster online which gave me 4 in store coupons a month included in price. I went there with my coupon to get a dvd never thinking that I had a problem. I started getting automated phone calls say that I had an outstanding dvd entitle "Candy Stripers" that I didn't return. Called the store and a girl told me that someone must have used my number on their account. Then they charged my credit card $23.47 which put me over my limit. I'm not going to go into all the details of the consequences of that. Talked to sales manager (who would not give me his name) all he could say was he's sorry. I don't have the receipt in question because I threw it out like all the rest of them. I checked my credit card records and bank card there was no blockbuster charges anywhere. They usually charge me for dvds when I go to the counter on my way out. Which means that I paid cash. I also keep track of my cash transactions with MS Money. No blockbuster there either. I going to go there in person and ask them to provide me with the receipt that I always have to sign. I really don't know what happened I'm an honest customer and hate when others don't play by the rules. Well I'm going to dispute it with my credit card company and chop up the card. They really screwed me up and my credit rating. They're probably going to get away with that one. I'm so angry about this thats why I'm writing this and will check you site before doing business with anybody again. Please tell people maybe to use paypal or cash and please don't throw away your receipts.