my suggestion is check your lease. if the lease says they have the right to enter the property/ rental unit for emergencies (ie anything that left for later can cause damage to the property/ rental unit such as broken/leaking/ overflowing of pipes, plumbing, faucets, gutters overflowing....) then he most likely did not have to even give you those phone calls and didnt have to leave a message. when it says in leases that the owners, managers and maintaining departments can enter in cases of emergencies its just a courtesy not a requirement that they give notice. most rental leases do now contain this emergency clause.

another suggestion instead of just handing in a repair report maybe hand in a note attached of when you will be available for them to enter to do the repair work. then mark those days and times on your calendar so that you dont forget you have set aside those days and times for possible repair work to be done. this way you will not be caught unaware and naked when they come to do repairs.