User Activity

Why are o2 trying to charge me the same amount that I currently pay per month for my phone plus data ect when my contract ends?My phone will be paid for, so surely I should just be paying sim only charges. They think I should pay £20.82 for 3gb, plus...
I tried to reply to a text from a republic of Ireland number today and I'm getting the following message: Can't send message with sim1 - error 8I last sent a text there in May and had no issues.Can anyone with this please?