First of all, how do you know your spells aren't working?
Remember, it may take time for spells to bring the intended results. They results come when they are supposed to come, not necessarily the exact moment you WANT them to come. :)
I know it can be frustrating...but that's Magick. Sometimes things happen when you want them to...and sometimes it takes some time.
There are so many factors that go into this.
1. How much emotion you put into the spell when casting it.
2. Whether your intentions are good and pure, or not...
3. How well you visualize results...
4. How well you "let the spell go" (and were able to put it out of your mind and NOT obsess about "when" results are coming) or not...
And many more.
My recommendation to you is to cast the spell again...or better yet, pick another spell that will bring similar results, and cast it.
There is no rule that says you can only cast a spell once...or that you can't cast multiple different spells for the same purpose.
The more the better, and the more energy you send out into the universe.
I'm always here to help you, so open a support ticket if you need one-on-one help. (Full students ONLY...)