Numerous attempts at claiming missing miles

Hello. I've been trying to claim missing miles for flights on a Star Alliance airway last year, as they did not reflect on my voyager balance. I tried the capture the flights online. When this didn't work I called the call centre where I was told to send the details via email. I have done this twice (28/09/15, 26/10/15). Both emails went unanswered. I called the call centre today and was told that the person I spoke to was not authorised to load flights. When I asked if I could be transferred to someone who could, I was told no. Instead I should phone back in 30min-1hr and hopefully get someone who had that authority. When I asked what would happen if I got the same consultant again, I was told that if that happened I should try again 30-1hr later! I asked to be transferred to a supervisor and only after losing my temper were my ticket numbers and contact details taken down with the promise that they would be given to the supervisor. 5hr later I phoned to check that the supervisor had processed my request as I had not heard back. The supervisor was again unavailable. I find this level of customer service unacceptable. I would like to be contacted by someone with authority to assist