A favor is a friendly, gracious, kind, generous or obliging act that is freely granted. It is offered and not solicited.
A promise is a declaration assuring that one will or will not do something. It is a vow to commit oneself by a promise to do or give. It is a pledge: to make a declaration assuring that something will or will not be done.
When you assume and mistook favor for a promise, then misunderstanding comes in.
Learn to distinguish clearly between a favor and a promise to avoid false expectations, blind hopes and deep disappointments.
Never demand on favours given.
Never impose on mistaken promises.
Never put under pressure the people who have given you favor.
Have a humble and grateful heart for both favors and promises fulfilled.