Coop Packaged Bank Account

Hi,

Just wondered if anyone can advise on how to proceed.
I have had a packaged bank account with my coop bank privileged account since they opened it.
I was sold this on the phone, my previous account was opened years before as a student with the same bank.
I have complained to the bank about mis selling packaged bank account based on the phone conversation selling tactics. I was told it would be difficult to get as good a deal on the overdraft that I wanted with any other account. I have no record of this phone conversation.
My claim was rejected and this was backed up by the financial ombudsman due to the fact that I received a letter outlining that I agreed to the sale and that I could have continued with my old overdraft provision ( this was not as substantial and would have cost more for the amount I wanted to lend).
The ombudsman says if Ii can offer more evidence of the mis sale, they would support. How can I do this, others would also have been missed over the phone with no records kept, how do they prove a mis sale?