Hi sallyndavo, thanks for getting in touch - sorry for the delay getting back to you.
I'm also sorry to hear you've had a problem with data on your new SIM. It's odd that a replacement SIM would cause that to happen - if this is still a problem for you now, have you been able to check that the settings on the handset are correct for data to work?
On most handsets you can refresh the network via the Settings menu, please give that a try if you haven't already and keep us posted with how you get on.
Tom