Motor Installation without Authorization by Owners

We contacted K&R to get a quote on a Centurion gate motor at our house that we are renting out.<br> Later that day our tenant called to say she is happy with the installation of the motor. Neither myself or my fiance had authorised this installation as we contacted them to only get a quote on the installation. My fiance contacted the contracted electrician of K&R who said that he got permission to proceed from the accounts lady. We were annoyed that they had simply given permission to do this, however we thought it must be done in any case so we will just leave it. My fiance called the company to clarify that we did not give authorization to go ahead with the installation and to get the account details from the lady to make the payment. The lady became rude over the phone and cut my fiance off mid sentence to ask 'do you want the account details or not?'' This was very upsetting, we later got called ******* and ***** and were told we had no intention to pay, the supplier of the motor was unhappy to hear how we were treated & contacted K&R who then called us to complain about getting Centurion Motors involved and that we are making a big deal of nothing. Shocked at how rude they were!!