Sworn at by call centre agent

This morning at 08:57 am I contacted the call centre number ********** to ascertain when I will be receiving my refund for the deposit paid on a rental car I took back last week Tuesday and was told it was only processed today, a week after the car was returned and that I have to wait another 3-7 working days for it to refunded. As per usual, I requested receipts of the petrol that was replaced and which is being deducted from my deposit.

At the end of the call, the call centre agent named DEBBIE, did not end the call and I overhead her calling me a F@$%ing *****.

Lovely stuff. I called back and she told me she was reading a message on her phone, which I do not believe, because coming from a call centre myself, agents should not have their phones on them. Then I asked to speak to a supervisor thrice (as I phoned thrice to lay a complaint) but the phantom supervisor/manager was not able to take my calls. Not sure whether DEBBIE is lying or he really isn't there. I am still waiting on a phone call back.

As far as humanly possible, I will never be using your services again and I will be spreading the word. Because up until now, I have had a fabulous experience with Europcar, bar the fact the first car they gave me seemed to have an engine problem, but the consultants I've dealt with has been nothing but courteous.