you'll need to give the Virgin mobile team a call on 789 or 0345 6000 789 & request a new SIM.
£5 SIM replacement charge may apply.
However the symptoms you are describing do not sound SIM related, more like a faulty phone.
What make is it? Where did you get it from? Is it under warranty?
Is there a way that you can test your phone out before requesting a new SIM & possibly being disappointed?
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I'm really sorry that you're having issues with your phone.
We want to get this all sorted for you.
Are you able to let me know if you've called regarding the sim yet? If so, have you received it?
Let me know as soon as you can.
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Virgin Mobile Staff , However, All opinions are my own
Glad to hear it's all looking good for you currently adecooper
Let me know if you need anything at all.