The only things I can really fault you on - and this is being pedantic - is that you shouldn't capitalise "son", and near the end you have a comma that shouldn't be there (after "Whilst")
There might be other things needing tweaking, but that's all I picked up in my quick read Sorry you had to write this at all
I would call them and ask the name of the person to address the concern to - the to whom it may concern, while correct, looks less direct than if you actually name the person.
Is it going to have so many spaces in the true copy? I would make it into larger paragraphs.
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