Was this the same closet that opens on its own? Or was the closet thing already happening before you stashed the things in there?
In my life, I've noticed that, whatever thoughts I hold at a given time, I will encounter other people with similar thoughts or in similar circumstances as me. A lot of it is mundane stuff, like what I'm wearing, the type of phone I use, or things I like, and these are complete strangers who know nothing about me. The point is that thoughts are physically real and influence both ourselves and others. Like minds attract each other.
I know how agonizing a breakup can be, so I won't waste your time being judgmental. But imagine the negative thoughts that went into such a spell, and what types of entities it's likely to attract. I don't know if you're familiar with psychometry, but there are people who claim to be able to touch an object and psychically gain information from it. I haven't experienced it myself, but if it's true, then simply having the objects around could be a lasting influence, like a magnet for negative entities.
I don't know enough about hoodoo to give specific instructions within the framework of hoodoo, but I can offer some general suggestions. Depending on the type of spell, the exact steps may be different. Did you invoke any entity by name? This seems uncommon in a revenge spell, but if you did, you'd want to dismiss their services by name. Otherwise, a simple ritual of your own making, speaking aloud your intent, and specifically expressing forgiveness of the past and releasing all negative energy, should do well. Use similar implements as in the original spell (candles, oil, etc), but choose ones with no negative connotation. After you're done, burn the original items left over from the spell, if indeed you can burn them.
The voice telling you to never leave sounds an awful lot like someone angry over a breakup. Life exists on many levels and in many forms, both complex and abstract. I don't know if you attracted a full-fledged haunting or a more abstract thought form, but it's most likely attracted to someone or something holding a similar state, even if it's just an object imbued with anger.
This is the tone generator I use:
Tone Generator Software - Sound Frequency & White Noise Generator (PC or Mac)
I didn't write the program, but I've used it a lot. There is an option on the menu to write a tone to a .WAV file (you'll have to set the tone to a specific duration first). WAV files are pretty big, so I use Audacity to convert it to MP3. Both programs are free.
Also, regular speakers can be used instead of headphones. Headphones are just what I use, so it's the first thing I thought of.
I haven't heard of "devil's shoe strings" before, so I can't really recommend anything about that. I generally see tarot as harmless, as I consider it to be more of a guide for the subconscious mind. The most important thing, I think, is the intent that goes into each thing. Something used for guidance, protection, or blessing is starkly different than something used to curse.
My view on magic is that it's generally only as good or evil as we make it. There are exceptions, of course, but I'm rambling.
Good luck.