Can my current supplier stop me switching?

I have just had a call from my current supplier who I am trying to leave saying as there is a balance on my account they will refuse a switch over. I DO NOT want to stay with them can they stop this switch?

I have just had a call from my current supplier who I am trying to leave saying as there is a balance on my account they will refuse a switch over. I DO NOT want to stay with them can they stop this switch?

I believe if your account is in debit they are well within their rights to object to your switch. Please see this Bulb article: https://help.bulb.co.uk/hc/en-us/articles/360000291491-Why-has-my-previous-supplier-objected-to-my-switch-to-Bulb-