Immigrants jobs?

Here’s my question. Should immigrants keep their jobs and citizenship if they don’t understand English.

I was at my local Walmart the other day and I needed something from a case that was locked and I say a Walmart employee in that section who was helping someone in the same case I needed to get something out of. I asked them to get something for me and the employee just looked at me turned and left and started to talk to another employee and I went to them both and asked said I needed something from a case. They both just looked at me confused and not understanding me. They just started talking to each other.

I did not understand what language they were speaking in and I was confused because I thought you had to speak and understand English to work in customer service and interaction with customers.

So should employees who are immigrants loose there jobs and citizenship for something like it.
Updates
7 mo
I just don’t know if calling the store and complaining would do anything
Immigrants jobs?
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