E-on credit meter nightmare

I’ve just signed up for the electricity switch to yourselves from ‘E’ and didn’t think of changing to your gas supply. I’ve tried changing to sse gas but they say I can’t because I have a credit meter, my question is can you help me change to yourselves for gas aswell as electricity. From what my daughter has looked it’s hard to change supplier because of the current credit meter I have.

Some information here: