Yikes.

Do most of your clients give you too little information like this? What do you do in this case?

If you ask a freelancer for the price of converting code, he will natually need that code for calculating the time and cost. No one would give you a price before seeing the code. If your code is top secret, sign an NDA. If you don’t like the price, don’t place the order. That’s how it works everywhere in the industry, and I fail to see the problem. Do you not trust the NDA and fear that your code will be disclosed or what is it?

I will answer your question one by one.
1.
My problem was that i followed what you posted here and your support does not do what you preach because i was fooled by your support, and your support is not credible.I worked with Canadian travel agency for 7yrs and handle escalated customer, you reply is obvious that you have taken sides with your company instead of looking for how to de-escalate an issue.
2
Please don’t make me sound like a lair , I was quoted eur2250 for fix adaptation email was dated 21st Nov. That was why i requested an alternative quote to fix the code, confirm the current backtest and demo will be identical after its converted to C-lite. And was told”the conversion of 200 lines MT4 code to C will most likely already exceed the $250 budget” email was dated Nov 22nd. So based on that email $250-$499 sounded ok for me.
3.
I did not go to other places I already knew because i trusted the company i sent it to, and i used 3 different programmers to develop 3 different parts of the code, so as to make sure they never had an idea of what the final code will look like. I actually took most of those early steps you posted here to prevent conflict of interest before sending my code over, since it’s irreversible after i send my code.
4.
If I hadn’t sent my code over, I would not even post here. I know how customer service works, false advertising or inaccurate information by a customer service agent is very expensive. And just to let you know that was part of my job for 7yrs, I handled payouts to customers based on inaccurate information/solutions given by customer service agent which requires doing deep investigations, reading documentations and listening to calls accurately before replying to a customer. So its obvious you did not read my mails before replying or you just acted blind to say”but certainly not EUR 2250”makes me look like I’m lying and that is an insult.
5.
If you do not understand the reason i posted this was have the issue resolved and to prevent other people from running into the same mistake then I will go to every financial trading community to post my experience review so that no one falls in similar circumstance.