I would suggest you contact Pragmatic play and ask them how long it takes to investigate such cases. If they say it can take a week, You can give a week to the casino. If they take longer than that, then you may accuse them.
This is the right thing to do the casino has no control over the time Pragmatic will address the issue, although they could request to fast track, after you received good suggestions you could lock this thread and open it when you are ready to file accusations or the issue has been resolve, the one thing that you should not do is to play with the money that you intend to do, control yourself from doing so, w have seen issues where a player waiting to get his issues resolved made the mistake of playing with money that he intends to withdraw and losses it all, now he blames the casino, play on other casinos but with minimal funding just to satisfy your urge.