How do I deal with people like this?

[Anonymous]

I work in retail and I think I’m a very nice person. I’m a girl who’s brown skinned and im in my early 20s. I’m a college student and have been told I’m very pretty and well spoken and stuff like that.
I had a customer come in today. There were two of them and they were here before and last time they had complained about how the people in my store were harassing them because we kept asking do they need help and how they’re doing every two seconds. So they’re complainers

Today they came in again which is funny because they have a problem but still continue to come in. I had them at the register and I felt that I took my time with them. I waited for them to pull up their app and stuff like that. Im a fast person I talk fast and walk fast and stuff like that. They actually seemed kinda nice today so I thought the experience would be different. They came in after close and I naturally just bag things fast through customers. Apparently after they left my register they complained to one of my managers about how they felt rushed with me.

I was just appalled and disgusted and embarrassed at the same time. This is not the first time a customer complained about me over something stupid but I’m sick of it and don’t know how to protect my character at this point. I have a slight crush on one of my superiors and I feel like it’s making me look bad in front of my managers even though they love me and know I’m nice. ImThe one who told me said it didn’t make me look bad but I’m just so mortified over this. What do I do?

[Effably]

First of: Any manager worth their salary or having any experience will disregard a complaint unless it is either very serious or repeated often enough to warrant looking into. Especially in retail.

I don't think you can do all that much different. Them being annoyed at being asked if they need help to me reads as them feeling you were accusing them of shoplifting. Which marks the other result as petty payback.

With experience you will be able to spot the shoplifters from a mile away. That Might help.

[Anonymous]

I used to work in retail and I found that usually you can spot a problem customer before they get to you. If you were like a cashier or something I'd find it a convenient time to have to use the restroom so someone else has to ring them up. It's just an unfortunate fact that unreasonable people just looking for someone to take out their unhappiness on exist. And sadly retail workers bear the brunt of that.