Boot stopped working & doors not opening in cold weather after being opened once.

in 2022 during the cold weather I had an issue where my boot would open, but then when I closed it, it would stay shut for a random amount of time , could be a few hours, could be a day, and then eventually it would open again.

I tried to get Skoda to look at it but all they did is tried to open and close it a few times and it worked for them, so they said nothing was wrong with it, even though I explained it only happened in certain conditions.

During the warmer months I found this not to happen at all and the boot to work every time.

This year the behaviour started again in the winter months,  and since end of Dec/ January 2023 it's been stuck shut and is still shut and won't open, so I think it is now broken,  i'm just wondering how much it likely to cost to repair/replace this, is there anything I can do?

The reason i'm not racing to skoda to get it fixed is because  the passenger door driver side, has started to exhibit this random behaviour in cold weather this year, you open the door, get the ice scraper by pulling the back seat down ( cos the boot won't open), close the door, and it will not open again, and strangely the other 2 doors won't open either, it's like they are frozen shut, I know that isn't the case because I opened it without any problem.

The Driver door always works,  if I drive for about 10 minutes or so the doors will function, boot won't any more.

I'm concerned that there is something fundamentally wrong with the central locking on the car, any advice on what to check or could be the problem?

I have a L&K 2017 model.