Bad in-flight service & complaint resolution

I was flying British Airways Comair on 07 December 2017. Not only was the flight delayed for more than 1 hour and 30 minutes due to a wiper problem (which was surprising and I stand corrected as I am not an aviation expert but I assume that pre-flight checks could have easily detected this problem prior to departure), but also the in-flight service was so poor.

We waited for so long to be served our breakfast and when the breakfast arrived eventually, they ran out of coffee when it was my turn to be served coffee and the in-flight attendant told me they were refilling and she will serve my coffee after refilling.

The coffee never came nor was I offered an alternative drink. I complained to Comair and the response I got was that they apologize and offered me a R150 voucher for my next flight.

I rep**** and told them I am not happy with the response and I did not need the R150 but wanted to be given feedback that corrective actions have been put into place to ensure that delays f this nature do not recur and that the in-flight service is improved in line with their 2 core values of service excellence and ope communication.

I asked Comair to put corrective actions in place and give me feedback accordingly and to date, I haven't received acknowledgement of receipt for the email i sent and neither did I receive feedback as per my request despite the fact that I have indicated to Comair my intentions to describe my experience on Hellopeter.com if not resolved.

I also escalated my complaint to British Airways via their website and to date, I have received no response.