As far as I know, when one is placing a bet and the odds change during the process. A prompt pops up informing the user that the odds have changed and asks if they would still accept the new odds and proceed.

I read the conversation between you and one of the support assistant and the way they responded does not give any confidence. Seems to be something like language barrier or not properly understanding the complaint. I believe their support in the forum will help follow up and give a better answer. Just be patient, OP.