Yes was this her usual school OP or a new one you'd gone to specially for jumping? Agree with what's been said above re riding school ponies usually being pretty slow and dead to the leg (for good reason!), but have to say the majority of ones I've known perk up a good bit when they see poles and jumps and many really enjoy themselves doing a bit of something different to the norm, not saying they transform into whizzy jump-off ponies or anything but certainly they shouldn't have to be beaten and bullied just to go over a few cross poles - if they are that incapable or unwilling to jump, then they shouldn't be being used in jump lessons at all.
For this school to give her not one but two ponies that she couldn't get to go at all, something sounds off to me. To an extent I agree it's down to the rider to get the most out of each horse and of course if they don't know her or she isn't an experienced jumper, they aren't going to put her on their most forward going/best schooled pony, but your DD sounds as though she's generally capable and doesn't usually have an issue getting ponies going so I wouldn't be that happy with their answer.
I wonder, does the school usually do many private lessons? At the school on my yard, a lot of the horses, especially the beginner friendly, super safe, ploddy cobby types are far more used to being in a group and having a leader to follow - riding them in the school alone or even just in open order in a group does turn some of them even more slow/backward thinking than usual and occasionally quite nappy. For this reason I sometimes disagree with the common recommendation that people should book private lessons to start off with or to progress in a particular area, because, whilst good advice as it goes, it only works if the school is set up for private lessons and has horses/ponies used to it. Of course schools shouldn't really take bookings (esp £££ ones) that they don't have suitable ponies and teachers to fulfil, but plenty of schools do, particularly if they set up as being a voucher experience/'treat' place and don't rely on repeat custom! I think I'd maybe give them one more chance (sh*t happens, maybe the instructor was having a bad day or all their best jumping ponies had gone lame all at once or whatever), but unless it's better next time I'd withdraw my business and look for somewhere that has a bit more care and sympathy for both ponies and riders, as this doesn't sound a happy experience for anyone TBH...