My parents passed away and I used an auction company to dispose

My parents passed away and I used an auction company to dispose of many items (15 large boxes and some separate larger items) - some of which belonged to my late Grandmother and her parents.

I numbered the boxes and listed every item in each box. I gave the auction company a full list of every single item handed over to them - whether in the boxes or separate.

I chose this auction company as they told me that I could see everything on line and they said they would let me know when the auction would be held. They didn't. They just wrote and sent a cheque for £170 stating that was al they achieved in the sale.

I wrote back to them and asked them for a breakdown of the sale of the items.

After chasing quite a few times - they eventually sent me 2 sheets (from another auction house) who they said sold the items on their (and our) behalf. This sheet just had box of china, box of glass, ditto etc - all averaging £5 per box. There is no way in breaking this back against my details. There are no details of the larger unboxed items (Armari plates etc) at all.

I have asked them to give me a list of what they had in each box but they are not replying.

I am of the opinion that they have a duty of care to have a list of what they pass to another party for auction so should be able to provide me with some kind of breakdown - which makes sense. The information I have been provided with so far could mean anything and certainly does not seem to account for everything I passed to them.

Do they have a duty of care to keep a detailed record of what they pass to auction on a clients behalf?

What course of action do I have?
I am of the belief that they