Petco review: Fish sales

I will certainly not be going back ever! Today I went in after weeks of waiting for shipment to buy 1 guppy for my daughter. 1! The fish lady first asked me to wear a mask, in which I replied I have a medical condition and will not. She said we will have to social distance and I complied. I asked "How many fish is recommended for a 2 gallon tank?" She said the rule of thumb is 1"per gallon. I said OK, I would like to get 1 guppy. She said"I won't sell you one. "I said I only have one fish in there and it's smaller than the guppy! She said no, so I went up to the front to purchase the rest of my things and asked for a manager. The check-out girl was the manager and I said your fish girl won't sell me 1 guppy. She proceeded to tell me again the 1" "recommendation" and said if she felt like she shouldn't sell me a fish than she didn't have to, and also that my fish would grow. A fish I have had for three years that has never grown. This is a crock! I worked at pet-smart, I'm NOT a novice fish owner, and never in my life have I been denied the sale of a fish let alone a tiny guppy let alone 1 fish when I have 1 FISH which by the way is full grown and 1/2 an inch long so even by their math I had room for 1 guppy. I'm appalled. I decided to make my purchase but went to pet-smart and got all the things I needed anyways plus a fish plus 2 snails for free... so I returned the product to Petco. You will NOT get our business. I can not believe you denied a grown adult 1 fish! By the way the 2 Gallon fish tank I bought from Petco has a picture on the box with6 full grown fish on it!