Bitter ex cancelled flight!

So, My ex booked tickets for us both to fly to RAK CE, in sept and i paid cash but ticket paid on his credit card, on checking my account last week i noticed my ticket was not on the booking he cancelled it, called BA and told that nothing they can do, also the ticket was 100% Non refundable so he didn't get cash back, feeling little let down by the customer service as a long time BA customer

Any chance i should speak to someone again or just re-buy ticket?