Scoresense hit my credit report with a 50 point deduction when i canceled my membership. Internet

To whom it may concern,     I  was signed up with scoresense for the trial period and i was going to cancel when they offered me they chance to get the services for 9.95 a month in which i accepted.I had the services for several months and was fine with it until i found a totally free website that basically the same thing for free(Now when i called the people to cancel i was on both web sites looking at my credit score which was at 719,718,and 703 according to their reports,and by the other website it gave me an overall score of a 719). as soon as i got off the phone i noticed my credit score fell to a 664 like someone ran a check against my report .......I DON'T KNOW MUCH...BUT THAT SEEMS WRONG TO ME......and it really hurt because i am just starting to get my credit straight.