Unpaid dental Bills

I have a dental bill that needs to be settled from last year June, 5 invoices were unpaid yet some invoices before and after have been paid. The Dentist has tried to get payment from you, she has a name and a date for when they tried to get payment, but to no avail. They have now asked me to follow up. I have been a member of Essential Med for 4 years and this is the second time this is happening. Ayesha West form your claims department has just emailed me to say \Please be advised that I received the dental account for service dates 23/06/2014