@Add_02565 I'm sorry to hear that you are considering leaving Three. Most of our plans have EU roaming, so I'm curious as to why data roaming doesn't work for you. Have you had this investigated? I'd love to turn this around for you, just give me a shoutout using an @ mention (@Three_Deborah)
For the other parts of your query, have you seen the topic create by @Donna_09857 in our BillPay section. You might find some of it useful.