Did you get a letter advising you that you had been cancelled, and more importantly, why?
If so, I suggest you call Gilead (and who ever makes you brand of Riba). Tell them what happened, what your Notidication letter said, AND that you are still on tx (maybe start with that), and ask what you need to do to get approved for their assistance. If you meet their income requirements and furnish the info they want, you should be able to get the meds free, or with at least no more than a $30 co-pay. Also, panfoundation.org is available to help supplement what isn't covered.
Call Gileas My Support Path at 1-855-7-MYPATH (1-855-769-7284). Or go to gilead.com
Also, they can probably tell you what to do/who to call about the Riba.
I would start pursuing this immediately so you have no break in meds.
One final thought: You might try calling your speciality pharmacy, ( the one where the deliveries come from). to see id they help in getting approvals, etc.
Good luck and good treating!!! Pat