FIVE email attempts and NO response from Bankmed.

I am a former member of the Bankmed Medical Scheme. I have recently immigrated to the UK. I received an invoice from a hospital for a bill that was not settled by Bankmed. I contacted Bankmed on 2 September 2015 via email to both addresses [Email Removed] as well as [Email Removed] enquiring as to why the bill was not settled, as I was still on the scheme at the time of the hospital visit. After a few weeks of no response, I followed up with another email. Again this was ignored. I proceeded to follow up a further 3 times, taking the total email communications to 5. To date, I have been completely ignored. I receive the automated response emails, but nothing further. I think this is appalling service from Bankmed given that I was a member for a period of 3 years. The sad part is that I am sure someone from Bankmed is bound to contact me now as a result of this complaint.