I see that you are on Facebook and Instagram, seemingly to target the end-user to want to buy your product online or in-store (we have these at home by the way, great product!). I also see you are running Facebook ads but there are no ads live on LinkedIn.

Have you considered using LinkedIn ads to target certain content to specific job roles within the supermarkets? Not sure if this could help and I probably need some more context on your goals within supermarkets i.e. do you want to get them calling you rather than you having to call them (and is this goal even possible). Please let me know and I can elaborate further if required.