What is the ruling on communicating with a female colleague at work with the intention of marriage?

The questioner : In the name of Allah, the Most Gracious, the Most Merciful. Honorable Shaykh, what is the ruling on the following, and what is your advice to me? I got to know a girl through work companionship without either of us seeing the other, only through the work phone, following up on transactions, and discussing the affairs of the clients. From our dealings, it became clear to me that she is upright and strict in her uprightness and religion. I asked her to look for a bride for me from among her colleagues because I thought she was married. I thought she was married. When it became clear after months that she was a single girl, I proposed to her without any prior talk of love or the like. I asked her to introduce me to her brothers so that I could ask for her hand from them, but she refused out of fear of her brothers, and the matter remained pending on that, and she is hesitant regarding her brothers, knowing that there was no talk of love or anything else in the matter, and we remained in that state. What is the solution from your honor, and what is your advice to me in this?

The Shaykh : May Allah reward you with good. The reality is that it is very regrettable for such communication and understanding to occur between a young man and a young woman. May Allah the Exalted facilitate for this woman another man to marry her, and facilitate for this man another woman to marry, for the matter of communicating with women is of great magnitude and its danger is serious. Therefore, it is obligatory for the woman to be extremely cautious in this regard, due to the opening of the door to evil and fitnah (trial, discord or temptation) that lies therein.
And a question like this should not be presented in this forum. But since it has been presented, I ask Allah the Exalted on this day, while facing the House, to facilitate for her another husband other than him, and to facilitate for him another wife other than her, so that such a connection is cut off, and so that this door is closed. These are serious matters, and it is obligatory for the believer to keep himself away from them no matter what the situation is.