Anyfix can downgrade ios 14.4 to unsigned ios ?  My mean is that: Anyfix can downgrade ios 14.4 to ios 13.7 ?

My iphone XR to updated ios 14.4 today, and I can’t come back ios 13.7 . I searched on youtube and google, seems must use SHSH Blobs, futurestore,  running command lines..etc.. it is very complex with me, I wonder Anyfix can do this smoothy ? I’m happy to pay membership for Anyfix. But I need you assure me that: it will work fine as you described. If it doesn’t work as I want, you will happy to refund me ?

Thanks in advance. And look forward some feedback from you soon.

Regards,

Lee