Missing Cashback

[#1]

I was offered £75 cashback if i renewed my contract with plusnet and now it seems that there is no record of that offer on my account. I raised a ticket about it on the 1st of July and 9 days later it has been closed off without a response.
I would really appreciate a response to my query in ticket #106655347

[#2]

I believe all telephone calls to Plusnet are recorded so Plusnet can verify this by listening to the recordings. Just get complaining until they do, use the formal complaints procedure if you have to and make sure to have everything in writing (so no more phone calls) .
Twitter is also a good way to complain, not just this forum, as it is more widely distributed and prospective customers may check there for issues before joining..