Watch out for the "MASSIVE" Agency bonding fee???

I have just booked a 3 day holiday to Torremolinos with 321 Travel Agency and I feel I have been shafted. All the way through booking with them they mentioned the price would be £149 each, at the end they say mentioned an "agency bonding fee" this amounted to £18 per passenger each way a total of £72. I have never come across this before and the charge of £72 is absolutely ridiculous.

I must say in all of this they up to now have been polite.

Just read my e mail to and from them and make up your own mind.
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My reply to their e mail below 23rd October 2013.

On Wed, Oct 23, 2013 at 8:51 AM, Tom Allen wrote: Only relevant part of e mail shown.  

I have just checked my bank and you have taken a total of £370.83 out for my holiday. when we discussed the price it was £149 X 2 making £298 in total.

You have charged me a further £72.98 and you said when I phoned you on Tuesday there was an additional fee for “AGENCY CHARGES” which you said is mandatory.
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From:
Sent: Wednesday, October 23, 2013 12:10 PM
To: Tom Allen
Subject: Re: ALLEN HOLIDAY CONFIRMATION

Dear Mr Allen,
thank you for your e mail the content of which is noted and my reply follows.
During the booking process you were given the holiday sector price of £149pp, you were informed there was no booking or admin. fee the only sum that will be added was the agency bonding fee of £18pp on each flight. This sum was not just added and you were clearly informed.
We as a company charge the agency fee on ALL flights which includes the processing of your booking and assisting passengers with their check in/ api procedure on all flights and in resort 24hr support for any problems you may encounter on your holiday, which few or no internet booking agencies supply.
I trust this explains matters to your satisfaction, and thank you for your valued custom.

Kindest regards

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On Wed, Oct 23, 2013 at 13:28 PM, Tom Allen wrote:

I have noted what you say and feel as though I have been a little duped as you never at anytime mentioned what the total cost would be, you only quoted £298 and slipped in the “agency fee” which I and I dare say other people will fall for.

You say there is no admin fee but what you have charged is exactly that only you call it a different name and £72 for your services is absolutely ridiculous. I will be taking my “valued custom elseware from now on as I feel that I have been taken for a ride.

The old saying is “buyer beware” and I will.