If a member is obligated to restore any sum of money to the fund and fails or refuses to do so for a period of three months after written demand is made by the director, the member shall forfeit membership and receive no further benefits pursuant to the Educational Retirement Act. The director shall determine whether the former member’s contributions to the fund exceed the total amount of disability or retirement benefits the member has received and shall withdraw from any such balance of contributions the amount of money the member is obligated to restore to the fund. Any balance of the contribution remaining in the fund shall be paid to the former member or the former member’s beneficiary. In the event the money the former member is obligated to restore to the fund is not restored to the fund, the former member shall be subject to civil action by the board for its recovery.