Your remedy is to contest the probate if it is not too late. Do not delay, find a probate attorney willing to take this on ASAP. Without actually seeing the documents it is difficult or impossible to give more advice based on an internet posting.
I wish you the best with this.
This answer is provided for informational purposes only. Actual legal advice can only be provided in an office consultation by an attorney licensed in your jurisdiction, with experience in the area of law in which your concern lies.
In Ohio, once a Will is admitted to probate the personal representative must give notice to all parties mentioned in the Will and to all next of kin. Thereafter, the personal representative must file an Certificate of Notice of Probate of Will. From the date of the filing of that Certificate, any person has three (3) months to file an action to contest the Will. After that, the Will cannot be challenged.
There still is a question as to whether the terms of the Will are being carried out fully, properly and timely. It seems from you post that this is where you are now.
Note also that if your Father voluntarily created a survivorship or POD account, the person named as survivor or beneficiary on the account has an absolute right to possession of the account after your Father's death.
You need to have the facts and circumstances reviewed by a probate and estates attorney ASAP.