I'm using one popular messenger app. I'm from Ukraine, but the messenger is registered in the UK. One year ago I sent a poll to one private group (i.e. people can join it only by invitation given by group admins). Now I see that the poll's question and answers have changed to another. I have screenshots of what I have sent one year ago and what is in the group instead of that message now. That messenger doesn't have the ability to change poll data after sending it, so it couldn't be me or someone with access to my account. The poll was about drugs, now it's about Russian tea, so I think it is the messenger's support who changed my poll due to a possible violation of their policy. Also, messenger support does not reply to messages for years, so most likely they won't explain the situation from their point of view. Now, I have several questions:
Isn't reading messages by messenger support without permission of group administration or court illegal?
The new text of the poll is still accessible in the group and it is signed by my name. If someone will check that message now, he will probably think that the poll is written by me, but it isn't. So, isn't changing messages sent by me without asking or even notifying me illegal?
If the things I have listed above are illegal, is there's anything I can do? Preferably non-judicial way.