Answered on Oct 03rd, 2016 at 8:46 AM
Did you receive a preliminary notice in the mail from the pumping company? If not, they cannot lien your property or come after you for materials provided more than 20 days before the date of the lien. You will probably need an attorney to write a letter to the pumper citing the pertinent law and warning them against filing an invalid lien and telling them to go after the contractor.
BTW, just because it was verbal does not mean you do not have a contract. Contracts may be oral. Now, for home improvements, there are written contract requirements established by law but they do not invalidate a right to payment.
Adam S. Warshaw, Burbank CA; this answer is not legal advice and does not establish an attorney-client relationship.