Plane delayed entire day

I am a resident of Dar es Salaam and was scheduled to travel to Kigoma for my wedding. I booked a flight one day before the wedding as I could not find flights on an earlier date. Sadly, my plans were disrupted when the airline cancelled the flight without prior notice. I was already at the airport and ready to board. Unfortunately, it was too late to arrange alternative transport to Kigoma, and the wedding date had to be postponed. Moreover, my soon-to-be wife thought I was abandoning her. Upon hearing that I could not travel for our wedding, she fainted. It was only later that she understood the situation, but by that time, it was too late. The fainting incident caused her to suffer headaches from the fall. Do I have any rights against the airline? Please guide me.
SD, Dar es Salaam.

We are sorry to hear about this frustrating experience, especially given the significance of your travel plans. The Civil Aviation (Carriage by Air) Regulations, 2024(GN No. 4 of 2024) govern aspects of the carriage of passengers, goods and cargo by Tanzanian airlines. Regulation 24 of provides that in the case of cancellation, delay or denied boarding, passenger shall be offered-(a) reimbursement within seven days of the full cost of the ticket at the price at which it was bought, for the part or parts of the journey not made, and for the part or parts already made if the flight is no longer serving any purpose in relation to the passenger’s original travel plan, together with, when relevant, a return flight to the first point of departure, at the earliest opportunity; (b) re-routing, under comparable transport conditions, to their final destination at the earliest opportunity; or (c) re-routing, under comparable transport conditions, to their final destination at a later date at the passenger’s convenience, subject to availability of seats. Please contact the airline for further information on the airline’s cancellation policy and check your ticket for terms and conditions which may affect your rights against the airline. If the airline refuses to give you your rights, consider filing a complaint with the Tanzania Civil Aviation Authority (TCAA) or seeking legal advice.

Regarding your wife’s suffering, it may not be straightforward to hold the airline accountable for this incident, as she was not a passenger with this airline. Please consult your lawyer for further guidance.