If you confirmed the correct fuse type and value with the device maker and bought that fuse from a fuse dealer, and the fuse blows, I do not think you have any recourse with the fuse dealer if they choose to not replace it.
The reason is that these are fuses. Fuses are SAFETY AND PROTECTION DEVICES. You have to be prepared to replace one when it blows for any reason. It goes with the turf in the case of fuses.
Yes, fuse dealer makes a hefty profit likely and could afford to replace a blown fuse here and there but no fuse dealer is obligated to replace a fuse if it blows. Its what fuses do!!!!!
So if one is not happy I'd say find another fuse dealer whose properly spec'ed fuses do not blow when it seems they should not.
The cost of replacing expensive fuses when they blow is a topic worth some discussion I think. Its a normal thing to expect that some fuses will blow over time for whatever reason and have to be replaced. You might find a nice fancy fuse dealer willing to replace some to some extent but its not reasonable I would say to expect that.
If the cost of replacing blown expensive fuses becomes a problem for anyone, then I'd say you need to find an alternative. There are many high quality commercial fuses out there for not very much certainly in comparison. That's why 99.999999999% of the world does not use high priced fuses.
If the sound quality benefits justify the normal total cost of ownership of expensive fuses over time, then no problem. Its the typical high end audiophile dilemma, optimize sound quality for higher cost or not.