Solar Panels

Hi i need some advice please i have just been advised by Octopus that they can't take me on as a Solar Panel  Customer because Ovo won't let me go due to debit on my account. I registered with them in April kept in contact  because they weren't contacting me they assured me everything was fine  until August only then did they inform me that there is a problem with import because i am still a customer with Ovo. They also raised a complaint for me but have told me thst they can't backdate any earnings from Solar Panels either. Ovo have told me due to my new heating sytem they don't do an Economy 7 heating tarriff....even though they promised me that they could when i initially explained to them about the new installation. Can anyone advise me please?