G E Money and British Gas

I put in claim to British Gas last Friday 16th August, for when I had a boiler installation in I believe around 2005/6. The salesman came to my house, went through what they could do and applied for the loan using his phone. After a few minutes it was approved and the installation went ahead as an emergency as we didn't have any proper heating at that time. The loan was through G E money and I remember the cost of the installation was about £3000 and then interest added on top. I do not have any paperwork regarding this sale but I really think that ppi must have been added. The salesman didn't ask much about my work which was with Social Services at that time and I only had a 10 hour contract with them. Also, my daughter has said she believes that the salesman would have been given a certain amount of commission which I am not sure would have maybe been added? I received a phone call yesterday the 20th, from British Gas who told me that I needed to remember the year and if I had any evidence as G E Money stopped offering ppi in 2005. Can anyone tell me if this is true. He is supposed to be phoning me again tomorrow for an answer. Many thanks