Any question answered...

GF called window repair company. They said they would come and measure the window that we need replaced. They have already charged her card over £200 and yet no one turned up to do the measuring. She rang and complained and they (tonight) again failed to send someone to measure the window.

Can we have them killed and/or have hsbc kill their dodgy transaction?

Was it a credit or debit card?

If credit, you can just ring up your bank and report it as an unauthorised transaction. Usually they'll refund the money immediately and also black list the company so they can't take more money from your card in future.