Instant checkmate.com Charged for new services while trying to cancel Internet

 I tried to cancel my trial membership with Instantcheckmate.com. Instead of canceling the membership they actually coerced me into signing up for 5 more services. The man speaking on the phone could barely speak English so I really didn't know what I was signing up for and how much the charges were going to be. I attempted to call the same number right back and it was no longer able to receive calls. I don't know if Instantcheckmate.com is behind this or a third party business intercepted the call, but it all just doesn't look right.