Sorry to sound harsh, but its time for some tough love.
The MOD regularly receives complaints from people who feel that wrong has been done to them, or by someone else and that the MOD should investigate and 'do something about it'.
These claims are usually taken seriously, and by that I mean an investigation will be undertaken into the facts of the situation, which can often mean reviewing documents not available, or not seen, by the complainant. This will often involve a lot of staff time, which is essentially using taxpayers money to fund an investigation, as the person looking into it has a day job to do as well. They will look into it and make a decision based on all the facts available to them, and not just those of the person complaining.
It sounds to me like you have received an answer that you dont like, that the MOD has spent a lot of time and public money investigating it, and you've kept complaining and still the answer hasnt changed.
Your reaction is to instead post an angry post on the internet which makes you look bitter and not very mature, besmirching the work of an entire office of people who are doing a reasonably good job of ensuring that people get their medals. (I've used them plenty of times and never had a problem with them). You've decided that because you aren't personally happy that your version of events hasn't been believed, you have the right to make some fairly harsh allegations against an entire organisation.
I'm sorry you feel aggrieved at what has gone on, and that the answer you were seeking isn't the one you hoped for. You have to let it go though - please don't become one of the many sad people who cling in vain, and frankly futile, hope that your collection of letters to different people will change the answer. Posting grumpy posts here, or elsewhere doesnt acheive anything and won't change the result, and only makes you look small. Personally I'd chose to walk away with my dignity intact, pour a stiff drink and realise there is more important things in life to worry about than whether Bloggs has got a medal that he may or may not be entitled to.