Awful customer service

Been trying to switch my gas from Bulb for more than 8 weeks now.
Each time they manage to come back with another excuse why they are rejecting it. The latest is that the ‘National Gas Database’ are rejecting the switch as my postcode with Royal Mail doesn’t match.
I’ve contacted Royal Mail who have confirmed the postcode on the ‘PAF’ is correct and that it shouldn’t be a problem with the Gas Database if needed to be changed.
I get the feeling it is Bulb who are being difficult - I have asked for a contact at the National Gas Database but obviously they can’t give this information out (don’t want to be found out to be fobbing me off!)
When I ask Bulb to help I get the reply “lets see what happens.”
Pull you finger out Bulb and actually help your PAYING customers!