So I've got a bit of a weird situation. I've been receiving e-mail receipts from a reasonably well-known high street retailer in the UK for transactions that have nothing to do with me. These seem to be till transactions (e.g. someone pays in-store and is asked if they want their receipt emailed to them), so I'm not sure if someone is incorrectly providing my email address for multiple transactions a day or if their system is defaulting to my email address for some reason.
Either way it's extremely annoying. It's 5-6 emails a month and I'm not a customer of this particular retailer and never will be, so as far as I'm concerned they are emailing me and likely storing my email address against my wishes. I know I could do the easy thing and just block emails from their email address, but I don't feel like a retailer of this size should be bombarding me with multiple emails a month when the emails have nothing to do with me (and it ultimately doesn't solve the issue).
I've contacted the retailer multiple times and each time they tell me they've taken steps to stop emails being sent to me, but nothing seems to change and I'm still getting emails from them. This has been going on consistently for maybe just under a year or so at this point but I've had random emails of this nature since 2018.
I'm wondering what action I can/should take at this point? I feel I've been reasonable in notifying the retailer that they are emailing me in error, but their lack of action makes me feel that they are being negligent with my email address (and therefore my data) at this point.
I was thinking of raising a Subject Access Request with them for any records with my email address associated, with the hope that prompting them to follow a legal process might cause someone to investigate, but is there any other legal paths I can/should follow?