They should be if their website is updated with the announcement, but you might want to ring them to confirm this.
Those prices you have from Eon seem rather high, are you on a nil service charge tariff and is it Eco7? If so, whats your second tier day or night rate?
The difference shouldn't be that much is what I'm getting at. Make sure your comparing the same tariff, as the prices you give for Eon look like General Domestic Nil Service Charge, however Ebico's are Economy 7 rates.
If you are unsure what tariff you are on with Eon, it should show you on your bill.