Hi Cherry, answering your questions is a good exercise for me, but it ultimately boils down into doing what is more consistent to the kind of person YOU are. Water or stone? Your previous personal trainer seems to be water, either by nature or by circumstances, maybe even encouraged by the fact that you and her were kind of getting "close"... friendship and professionalism doesn't go hand in hand sometimes for some people... By the way you ponder your options, I guess you still feel some friendship towards her and you would like to bring it to a nice closure in any case...

Me, on the other hand, would be more practical and elaborate much less: look for some other person to go with you to the ballet and just contact her about your previous prepaid investment with her, as politely as possible... In my opinion, it's not you that must explain and elaborate much, this task falls on her since it's her that totally went incommunicado, as you say. Stick to the Turkish guy if you regret somehow coming too close to a female personal trainer and you want to keep it more professional (and accountable from now on) or just try another female trainer if you think that will motivate you much more, that's a very personal choice...

This is what I came up with, hope you liked it, just trying to help . Stay well, Cherry, kind regards and congrats for investing methodically in your physical health (I should probably do the same :P).