Encourage it to grow up a cane so it's well above your flowers etc. Once well clear, mix up a glyphosate weedkiller such as RoundUp in a large bucket. Put on a pair of rubber gloves then a pair of old thick socks over the top of them. Bear with me - sounds ridiculous but it does work 🙂

Dunk hands/gloves/socks into the mix then stroke onto the bindweed leaves thus transferring the weedkiller to the leaves, Might take a couple of goes before it finally gets rid but it will work.

Another wee tip - use the RoundUp at half strength then repeat in a couple of weeks, using half strength again. More effective than using the full strength once.

Good Luck 🙂