Why are you ordering stuff over a phone call and what does a smartphone app have anything to do with it lol
If you mean ordering from a phone shopping app, 1) you can just enter credit card details into the app, you don’t need your bank’s software, 2) you can just use a website on a computer
OP sounds like a victim of Python 3, finding various Python 2 projects on the internet, a venv isn’t going to help