Upgrade promises not fulfilled

<p>I upgraded my son's contract around the 10th June 2016. At the time I said I wanted exactly the same contract that he had which included an extra 500mb of data. This was agreed to telephonically and you should have the recordings. He was given a once off 10 000 GB which seems to have expired but the promised 500MB was not loaded. I tried to call on Saturday and was put through to the upgrade department. They then verified me again and hung up. I tried to call yesterday and today and the calls were answered but nobody actually spoke.</p> <p> </p> <p>Please can this be sorted out as soon as possible.</p>