Yep, the best way to get yourself out of this matter is to stop ringing her from this moment. I know you won't be able to just stop thinking about her but you need to realise that, though you deeply want them to, your phone calls are accomplishing nothing, your wife is determined in her stance and you have not changed her mind. Continual attempts to do so at this stage are futile and, as you are now aware, could land you in a lot of trouble. As the others say, I'm sure it won't be anything to severe on Saturday as long as the phone calls stop now and and don't start again.
I'm sorry for your situation, good luck with the future.