Price increase without warning

Visited the branch on 11 Nov 2021 and was very impressed with the reception and customer service up to that point. As they had no stock we were unable to conclude the sale. On 7 December 2021 we received an email that the vehicle price increased by R8000.00 as of 01 December 2021 and that the delivery of the vehicles will now take up to 16 weeks. I would have appreciated some correspondence or warning prior to the increase. I will therefore take my business where it is more appreciated.