Spend some time eduction yourself on  how unlawful detainers work in your local market. 

@Horacio Gutierrez  In California, after the 3 Day Pay or Quit Notice, if the tenant doesn't pay you can proceed right to filing for eviction (Unlawful Detainer). 

I suggest starting with that and following up with filing an unlawful detainer if payment is not received.

The process may be different depending on your local city regulations, but the basic eviction process in California is:3 Day Notice to Pay of QuitFile Unlawful Detainer case in local courtProperly serve the court documents to tenant(s)Wait 5 days for tenant(s) responseIf no response,apply for default judgement in court and Writ of PossessionWait 3 days, take Writ of Possession and sheriff's fee to courtWait for Sheriff to give notice of actual eviction of tenant(s)Show up on eviction day to change locksDeal with any personal property as required by lawIf response, then you request a trial date and go from thereI'm not sure what you mean when you write that the eviction service isn't getting it done.

It might be an eviction matter, or it might be called unlawful detainer, or it might be called something else.Second, once the people are "out" of the place and you have possession, then you have to determine how the abandoned personal property is handled.

Following the advice of the police we file a "FORCIBLE ENTRY AND DETAINER" with a lawyer($400.00) we pay for the summons($90.00),and court clerk fees($252.00).

Did you serve them with an Unlawful Detainer order?

First a non-judicial foreclosure, we brought action in Circuit Court for wrongful foreclosure in 2008, beat an unlawful detainer by purchaser at foreclosure, as we filed substantial evidence of wrongful foreclosure.

I also have this clause: The acceptance by Landlord of partial payments of rent due shall not, under any circumstances, constitute a waiver of Landlord, nor affect any notice or legal proceeding in unlawful detainer theretofore given or commenced under state law.

First a non-judicial foreclosure, we brought action in Circuit Court for wrongful foreclosure in 2008, beat an unlawful detainer by purchaser at foreclosure, as we filed substantial evidence of wrongful foreclosure.