Hi,
I am sympathetic about them messing with your prescription without telling you! At my surgery, non drug items can be added by one of the staff, who is not a Dr.
However, as others have said, if you need Glucogel regularly, and do not feel in control without, then perhaps it is worth making that appointment ith the Dr, as this is no way to live. I have suffered severe hypos in the past, and know just how scary it can be...and no one on a wensite telling you to sort this out is going to help I know! Personally, I HATE the taste of the gel, and never, ever take it...but I have been given it when I can't look agter my own hypo. If you are able to take it yourself, the grab something like a small can of coke etc. I guess, if you regularly need other peoples help to sort out hypos, then this is a serious matter, and one that stops you driving etc, and you should get some professional advice.
Best of luck!