SLOW SPEED PROBLEM NOT RESOLVED AFTER A WEEK

I have now for the third time this past Sunday reported slow upload speeds on my LTE line, and I am STILL sitting with the same issue!!!<br> <br> I have been given reference number ***0 for the call that was logged, and was told that someone would be in contact with me, but nobody bothered to call me, or fix the issue!<br> <br> Getting upload speeds of between 1 Mbps and 3 Mbps is totally unacceptable!<br> <br> I require resolution to this query LAST WEEK already!