First of all bumpage is working it just takes time and most people give up to early, I was in contact with someone that did it and was successful and he said it takes approx 2 months of daily bumping to start seeing results, unless you use a few services to speed up the process, and this is were some people fail because they give up to early, (he mentioned to me that for him it only worked on TU & EQ not on EX)
Now the other proven method is to file a dispute, and here is how it works:
You need to send a letter to the institution that inquired your credit at the address provided in the report, saying that your not aware of the inquiry and you would like them to remove it ASAP (there is a special Legal Letter available for that) the main request should be they should send you a "Deletion Letter"
It may take up to 30 days till you'll get the Letter from them and then you'll need to send the letter to all 3 agencies and they should remove it ASAP,
This method is proven to work, although YMMV.
You shouldn't do it on a inquiry that got you approved for a CL because they won't remove it,
Sometimes they will tell you that they have prove that you did apply for the line of credit, then you'll need to reply that it was very confusing small letters and you didn't understand that they will do a hard inquiry (there is a special legal letter for this as well)
I have the legal letters in my computer and I'll try to post it soon,
And back the know factor YMMV..