NO CUSTOMER SERVICE FROM DISCOVERY!!

I emailed the claims department on the 17 June as it seems my primary GP was changed however I did not make that change. When I visited my doctor 2 weeks ago I was them issued a doctor's bill because I was advised that my doctor was removed as primary. Removed by who?? I emailed the discovery claims department on the 17 June. Their automated message says someone will contact you in 48 hours but here I am 6 days later with no reply from discovery. Gp's bills are interest bearing but that's not discovery's concern. All they do is raise their premiums every year massively but they have no customer service to offer!