I'm curious what exact betting behavior landed your account in this situation. The only thing that I could think of off the top of my head is that you must have been using some sort of martingale betting style to where at some point they felt the need to put a cap on how far you can take that strategy. Is it possible this or something like it is the reasoning behind your new limits? If it were me, I'd take the hint and make sure my funds were protected, but reaching out to them and seeing what they're willing to do for you or what explanation they have seems like it would also be a good idea.
That's what he didn't know and that is why he is asking the support and on here if someone had experienced the same thing. Stakes support doesn't also have an idea since they stated that the issue is on the provider's side. If this is about martingale, then gambling sites already know that it can happen and they have a counter for it. They can put a bet limit but I don't think this is the case of the OP since he said he only bet 0.2mbt which is 4 usd only at the moment.
I think his funds is still safe because he didn't say that he got banned on stake but only experience some betting limits. I know, maybe the op can try to verify his account or submit his kyc. Or he can wager more to increase his vip rank. See if that helps increase his limits.