Sorry to hear this Chris. From the experiences of several other forum contributors it would appear that if you had ordered an Audi Q3 you would have had the same problem. In fact, the majority of manufacturers seem to be experiencing delays of this nature.
Motability customers seem to be doing worse than private buyers, although I think that in a large majority of cases it’s also because the dealers don’t have build allocations when a Motability customer ‘orders’ a car and in reality the dealership sits on the order for a month or two before even placing it with the manufacturer.
Edit – Just noticed that the dealer originally quoted you a two month lead time. That was never going to happen. Three months minimum was the lead time back in the Spring even before the semiconductor crisis started to really bite.