MSA BALANCE NOT REFUNDED

I was on classic saver from 2*** where i changed to Key care. when i changed to key care, my MSA balance was never refunded to me. when i started inquiring in 2015 i was told that i have been paid back, but the account number they gave me was the one i closed in 2010. so it was impossible for me to get that money as the account was closed, <br> Now from November i have been phoning the call center inquiring about the money, they asked me to send the new banking details for them to refund me, which i did. till now there has been no refund, no feedback. whenever i call them they promise to phone back and they never do. <br> <br> can discovery please sort out this thing<br>