Supersonic has the worst accounts department in the world! I've been trying to get them to allocate my payments for almost a year now, but I keep getting told I'm in arrears

Supersonic has the worst accounts department in the world! I've been trying to get them to allocate my payments for almost a year now, but I keep getting told I'm in arrears. I emailed accounts department on Wed 28 May 25 and received ticket number SST693731 ..ITS 8 DAYS LATER AND NOT A SOUL HAS EVEN ACKNOWLEDGED MY QUERY. I suppose they have so many complaints they can't cope. PATHETIC SERVICE!!!!! Someone please phone me