Homechoice committing *****.

My account with Homechoice was de*****ed for the amount of 30k. I found out this when I noticed big amounts of debit orders going off my bank account, and when I enquired with my bank, I was told they are all coming from Homechoice. I went there to found out what is going on, then i found out that someone used my account to purchase things without me knowing. And this was done in a way that, my contact details and home address was changed on my statement so that i do not receive notifications via SMS and my monthly statement. But what surprises me is, with Homechoice or any other retailer, whenever one changes their home address, you have to prove this is your new address by sending proof of address with your names clearly stated on the address document (FICA requirements). So, I don't know how this was achieved because I have no other address besides the one i provided to them when i opened an account with them, but somehow Homechoice changed these details without proof or me personally changing them. So, I need Homechoice to verify with me who changed the details on my account, what information did they give for Homechoice to change my details etc. and what are they doing to solve my dispute becuase this is clearly a ***** case, and Homechoice is dealing with this case with NO INTEREST, which makes me wonder if this is not an INSIDE JOB.