Internet on Iphone 4s not working?

I got the iphone 4s last week and everything was working fine, no problems. Then I ran out of internet allowance so obviously couldn't use the internet for a few days. Then I topped up £15 which meant that I would get 500MB of free internet to use (as part of my orange dolphin package.) It took until today for this to come through, however, although I have had the text telling me I have this amount of internet to use before a certain date and I have signal and the little 3G symbol comes up in the corner I can't use the internet or any online apps (like snapchat and facebook messenger.) Any ideas? This is really starting to bug me! :')

Added (1). Not sure how clear this was:
I had a message from orange saying if I topped up by £15 before the 26th I would get 500mb again, I topped up on Friday and had the message this morning to tell me that they had given me the 500mb but my internet still isn't working.

It depends where you are.was it in a erfhejki think you should contact them.

You need to wait until the next billing cycle.adding money to your plan doesn't reset the limits.

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