We are working for JE Dunn doing the demolition in phases for the remodel and expansion of the San Marcos Library for the City of San Marcos, TX. We started work on February 18, 2020 which was a time and material change order to our original contract. It took JE Dunn February, March and part of April to issue the change order that they signed our CO proposal for the work. We also did work related to our original contract. We billed the change order (which was finally issued and per JE Dunn approved) and the additional work we did on April 21, 2020. We have not been paid for this work. We are looking at 45 days since pay app and no money yet we started working in February. JE Dunn has provided their bond information. What are our options?