I understand you, I am also super mad because I did already deposit money to be at my college residence starting November 15th. My embassy send me a letter through GC key stating that I am approved (giving me a study permit number, expiry date and all that jazz) BUT told me that since I am not exempt they would not request my passport. No letter of introduction. Many people say that they don’t know whether they were approved or not, but knowing that you are and not having that freaking sticker in your passport stamped is even worse. There is nothing I can plan, but I have to come to terms with potentially losing about 1000 CAD for each month my visa gets delayed.
Your daughter is super fortunate that her parents know English and can be as invested into all of this process. Mine can only yell at me for worrying over this stuff since they speak and read zero English. They say it all doesn’t matter, I will be eventually in Canada. Nonetheless, please keep her thinking positive, even if you are super depressed. It will work out at the end.
P. S. By the way, did you guys try calling IRCC branch in London? Maybe they unlike Ukrainian accept calls. I googled and it seems as they do have a phone number. Also, it you send documents through the webform then local IRCC branches do give at least some form of response (worked a few times in my case, otherwise they ignored my questions)