Is Charging High Fees for Hajj Guidance by a Muallim Permissible in Islam?

Can anyone provide insights into the following statement regarding Islamic teachings? **Statement:** Taking a tax, extra fee, or charge from pilgrims intending to perform the obligatory duty of Hajj is impermissible. *Narrated by Ad-Diyaa with sahih isnaad.* --- In my country, and possibly across the Indian subcontinent, it's common for an ***"Alim"*** to accompany pilgrims. This individual, known as a *Muallim*, helps ensure the pilgrimage is performed correctly by finding mistakes and assisting throughout the process. However, they often charge significantly more than the usual cost. For example, a ***Muallim*** might charge an additional 100,000 BDT per person on top of the usual cost, making the total for a married couple approximately 1.4 to 1.5 million BDT, which is extremely high. My question is: Is this practice halal in Islam? Is it permissible to earn money in this way, which might seem exploitative or fraudulent?