HelloFresh complaint: Refuse to reimburse after I’d tried to end contract.

Mid October I realised I’d made a request for hello fresh delivery. I suffer from severe fatigue so I hadn’t checked the ingredients properly. Once I had done so I immediately realised the recipes did make it easy enough for me to identify my allergy, I am Coeliac. Once I realised within moments I made contact on the chat line and explained I I’d made a mistake wanted to cancel. The person agreed. As far as I was aware that was that. Then the following month £44 was taken from my account Hello Fresh. Then a week later a email stating a delivery was due. I immediately contacted the chat line again. The person acknowledged my previous contact which she said she could see and agreed to action the cancellation again. However, when I asked for reimbursement of the mo et taken she refused on basis I hadn’t actually cancelled the ‘subscription’. I explained I may not have used that word as I wasn’t aware of the exact terminology but that I had made it clear I did not wish to participate in their scheme. That surely the onus was on the staff member to clarify that with me? At that point I was cut off and unable to access the chat site again. I’m a pensioner living in my own in low income. I’m also disabled I find it astonishing this company is happy to take advantage of people in my position.