Leaving orange after many years

The woman at orange tried to tell me I'd used the £20 credit I'd put on 2 days ago up on the internet and I hadn't used my phone at all in the 2 days since I topped it up. I got very angry and said I was going straight tgo the phone shop leaving them and getting a T-mobile sim card .She offered me a £10 refund but I said no I'd topped up with£20. I will never use that company ever again. I've been with them for years and never had treatment like that ever before. I will be getting Gray a T-mobile sim card too and putting in a formal complaint on Saturday. Big warning to all Orange customers.