^+1 - Too little information.
A few additional questions.
VHS-C tapes? On what camcorder were the tapes recorded? What speed?
Is the bad viewing if played directly to a TV set, or after capture?
Is it a standard old SD tube TV set, or a High Definition TV? (VHS generally looks pretty bad if fed directly to a HD set.)
Is the chipmunk sound both high pitch and fast talk, as if played too fast?
Is the picture tearing or rolling?