2 possibilities come to mind for what the 14th digit is: 1) if OP's ticket has more than 4 coupons, it could be the sequential ticket (e.g. ticket 235XXXXXXXXX1-2), or 2) the 14th digit is the coupon number (i.e. segment 1, segment 2, etc.).

Regardless, sounds like OP doesn't have a valid ticket and needs to get it reissued ASAP. I would recommend going in person to a TK sales office if no other methods have worked.