I would like to have a copy of a phone call I received recently from the DWP. Be it an actual sound copy or a written copy of what was said.

Is it actually possible and if so, how do I go about it?

I was told the outcome of my PIP M R, but on receiving my actual decision letter it is different from what I was told over the phone.

Can I use a copy of this phone call in an appeal at a tribunal?

Any help would be appreciated.