So sorry about this experience. It is common these days for people not to take their promises seriously again, and when you react, you become the bad person, because it is way easier to judge a person based on immediate actions that looking at the full picture.

Unless accommodations are hard to obtain where you live, it is highly discouraged to take an apartment based on a "promised" repairs. Immediately your money gets into the hands of your landlord, it is hard to get the work done most of the time. So,

However, based on the extent of the damage, you may consider repairing yourself and letting go if the cost won't be too significant, or tactfully reach the landlord and try to reach a compromise on it on the option you have to repair and remove the expended amount from your rent the following year (but to do this, you have to take very good records every step of the way as evidence, if possible, obtain and store receipts of transactions).

Just take it easy, anger no fit you abeg!