We can use this structureThe way in which the parts of a sentence, clause or expression are arranged. E.g.: make somebody + infinitive in "The teacher made me rewrite the composition." instead of have + something + past participle in the following cases:

(a) When there is a feeling that something must be done.

I must get my photo taken.

(b) In orders and imperativeThe sentence type used to express suggestions, directions or orders. E.g.: Clean your shoes, will you?s.

Get your hair cut!

(c) If there is a feeling of eventually managing something.

They finally got the computer fixed.

(d) In informalBelonging to colloquial or everyday speech E.g.: I want Mr Smith to call the guy that the committee has decided on. spoken English.

I got my skirt fixed yesterday.

HAVE + something + past participle
Causative with an emphasis on the activity Causative with an emphasis on the agent