Flower girls, piper, videographer are not basic!! £350 on invitations???!! We didn’t even have flowers beyond my bouquet and a few button holes.
I don't think money is the issue here though.
If you genuinely don’t want this wedding, then cancel now! My friend did similar, but had less to lose. They booked a register office and then went for elvenses at M&S. Family meal in hotel later.
It takes two to go to the register office. Fiancé is unwilling to do this and wants the big wedding but refuses to help with the planning.
And OP is also letting her family dictate on how to get married.
Tbh, if you cannot even agree on what kind of wedding you want, OP, and there is now way you could find a middle ground, I wonder of the while marriage is doomed in any case.
You sound so stressed. You will just end up being resentful of your future DH.
Could you cancel the whole thing all together of your fiancé is insisting on the big day without being willing to do his bit.
Or could you go on strike and leave the entire planning to him from now on. If you keep doing the work for him, it's easy for your fiancé to just insist on the big wedding as there is no extra work.
I would either call the entire thing off or hand over the planning to your fiancé. But don't carry on.