Similar tale to me, lazy attempt to reset the pistons on me m4 caliper & ended up bursting all the seals. Phoned to explain I haven’t really bothered to look after them, cba watching the hopetech vids.
2days later front brake is back with me, all new seals, pistons, pads & a pack containing spare 8 spare seals & a print out of the video 🙂
Only cost me 2.50 to post
Oh and they upgraded the hose too!