First of all welcome to the forums.
You certainly can claim back these charges and you are sure to get all the info here to do just that.
There are guidelines and a process of steps that you need to follow if you want to be successful.
The first step is to familiarise yourself with exactly what you need to do.
The fact that you have been in telephone discussions with them and they have already offered you some back makes no difference.
I will start you off then you should proceed using the faqs on this site,and having a browse through other claims in the sections similar to your own.
If you dont know the total amount you will be claiming then you will need to get this information by asking them for it under the data protection act.
A good idea is to start your own thread and post all your progress there.
If you get stuck along the way theres help here from others but remember at the end of the day it is your claim your money and you will be expected to do the work to recover it using tools and advice from here.
good luck
