I'd suggest just being a little less heavy-handed in the wording. As written, I think your introduction will make many people think they have an absolute right

I'd suggest just being a little less heavy-handed in the wording. As written, I think your introduction will make many people think they have an absolute right to have their data removed, even if it's legitimately being collected and processed on a basis other than consent. It seems clear that you understand this is not really the case, as you do cover that in your FAQ, but perhaps the introduction could be altered to be less confrontational in style? For the email, I'd suggest fine-tuning a few things. Numerical dates in European countries are typically given in D/M/Y order rather than the US-style M/D/Y, but the ambiguity could be avoided entirely by writing the month out in full, for example. Also, I wouldn't invite contact by methods where you haven't provided the necessary details, but IIRC your email template mentioned calling but without giving a phone number. If nothing else, these sorts of mistakes make such an email look less credible, which surely isn't going to encourage a positive response.