Have you talked to your supervisor about whether or not this bit should be written up as research? I had to abandon an early part of my research proposal as it was clear the recruitment was not going to be straightforward and it was going to take too long, but I'm writing it up as 'suggestion for future research', rather than including it with the research I did. For the bits of my research that did go ahead, I'm going to include things like numbers of gatekeeping agencies I approached, number who were able to help, reasons given for not being able to help, etc.