My server told me she isn't receiving any tips because the owner is withholding them. The food took forever and did not taste good. There were only two servers on duty for a packed dinner rush and it

There was only one waitress for the whole restaurant. The manager on duty was sitting at a table watching tv with the staff member who brings food to the tables.

My server asked me to tip in cash because they are not receiving any of their electronic tips. They explained that the owner will not send them any of their tips, which i'm sure is illegal. Please tip