Adobe keeps trying to charge me without any sub

Hey,

I am trying to be calm but it's kinda ridiculous situation. I was talking to support and trying to resolve this  for hours now in the last 2-3 weeks. Adobe keeps trying to charge me for almost 800 euros (couple of weeks ago and today - each time 3 times in a row ). Couple of weeks ago I was assured that there is no financial ties or obligations and I even got part refund. Great and cool.  But than again today early morning my credit card was blocked because Adobe tried to charge me 3 times for 800 euros again - support said "payments was send as a glitch" and I will not receive any future payment requests. I got no sorry, nothing. I couldn't even ask additional questions - support chat has ended. Is blocking Adobe only way to be sure now? How can I confirm that it won't happen again? It's a lot of money to "glitch" out of my account frankly. 

thanks for any suggestions