I was once in a similar situation. An older man wanted real badly to set me up with his daughter. It felt like he was already calling the florist, while I had never even seen her. I guess she was OK, but I got really weirded out by his insistence, so I tried to avoid him. In shul , I would make sure to sit next to my friends or be talking to them (not during davening). It made the whole situation awkward for him to approach me with my friends around. Now I know what it feels like to be “hunted”, which most men will not feel.
Yoyo, would going into the store with a friend or two help the situation?