I have now heard back from BA Holidays regarding this additional charge...
They claim that Avis do not have a 15 hour grace period and that as I collected the car the next day that I have gone onto the standard, non-contracted, daily rate.
BA Holidays have refused to refund me the additional charge.
I am sooo angry! What else was I to do? I called Avis to ask the question in order not to incur additional charges, I get told I have 15 hrs and then they slap a £915 addition charge on me for following their advice.
I am at a loss really as to where to go from here. It is basically their word against mine as I did not get it in writing and I suspect that they won't be able to find the recording of the telephone conversation.
I want to take this further but who should I take it to? I paid with a visa debit card (to avoid the CC fees on a £7000 holiday)... should I in the first place charge-back on my visa debit card or try complaining elsewhere first?
Your thoughts would be appreciated.