my "winnings" is like 0.2-0.4 eth max, so I depo around 43.4 eth and got on hold 43,7 (u can check ss in 1st page), so i don't think stake will offend for 700$ or I won't offend too if stake give me back only my deposit.
Like I said, I think the main problem here is the fact that you deposited a bigger amount of money but only gave limited amount of action, then even proceeded to withdraw instantly. Red flags all over the place and I am not surprised they instantly requested KYC and all that.
Of course it's not normal but annoying to wait that long for a final solution. They should just reopen your account, give you the chance to complete the 1x rollover and then let you withdraw. All that of course if you didn't violate any other rules we haven't heard about yet.