Rearrange the following sentences to write a formal letter
…… I have been a regular customer of your shop for many years.
. …… I would like a refund of the difference as soon as possible.
…… Dear Sir/Madam,
…… I am writing to express my dissatisfaction at the service I received.
…… After leaving your shop today, I realized I had been charged 20,000 fcfa instead of 10,000fcfa
...........my name is astou ndiaye, i live in kaba