Letter To Bank customer

Find suitable words to complete the gaps. There may be various options. Discuss your choices.
Dear Mr James,

Thank you for your recent letter expressing your (1)
______
dissatisfaction, irritation, anger, discontent
with the service of this branch. I can quite (2)
______
understand, imagine, realise, apprehend, comprehend
how frustrating it must have been to wait for over an hour for an (3)
______
interview, talk, chat, conversation, meeting
with one of our 'personal bankers' but, unfortunately, a number of our (4)
______
employee, staff, personnel, clerks
were off sick on that particular day and such a (5)
______
situation, condition, state
is, in fact, quite a (6)
______
(an) exception, rarity, rare occurrence
As for the matter of your £300 overdraft. I'm afraid it is clearly expressed in all our (7)
______
notices, papers, declaration
that the (8)
______
limit
without prior (9)
______
agreement, approval
is £200. Of course, if you would like to make an (10)
______
appointment
to discuss your account with us, we could make sure that your (11)
______
view, arguments
are adequately taken into account.
I do hope that you will accept my (12)
______
apology
for any inconvenience that you might have been (13)
______
encountering, experiencing, facing, undergoing
and trust that you will contact me if you feel that I can be of any further assistance.

Yours sincerely,

R.J. Thomas

(Manager)
There are many possible correct answers

Some answers are better than others and some may be incorrect for a concrete reason. Discuss your choices.