🚀 go-pugleaf

I have a problem that I'd like some help with; I'm wondering if it should
actually be posted in a legal-advice-type of newsgroup, but since it's
music related, here goes:

I recently purchased a sampler from (X) company. In their advertising
they stated that some of the peripherals they were offering would do
(x) things. After purchasing these peripheral devices, I found this was
not true. I called the company, and they said that they only completed
work on the peripherals to a certain point due to: 1) lack of popularity
of the product 2) time constraint and (probably, but not affirmed) 3) the
expense required to complete the product could not be justified, based on
the limited popularity.

My question is: Is this legal?  There have been no updates stating that
these peripheral devices would not function as originally stated in their
advertising. Moreover, the owners manual of on of these devices also states
that the product would do (x) function, which it also does not.

One of the main reasons I purchased the products was for the features
described in the advertising.  Since these features do not exist, can the
company be required to fix them?

So far, all that I've done to pursue this has been to send a statement with
the ad and owners manual to the Better Business Bureau, see what comes
out of it.

Any comments/suggestions would be appreciated.

Peter D.