In reviewing your post, it appears that you are already past the UD action (the landlord has already served you with the "3 day pay or quit" and has filed an unlawful detainer, received a judgment of possession, and has gotten a writ of eviction).
You are now at the point where the County Sheriff is going to forcibly evict you from the property.
Unfortunately there is very little that you can do at this point to stop the process.
You can try contacting the landlord to see if they are willing to extend you any courtesy in this situation (they may be willing to if you show them proof of employment and ability to pay), but they have no obligation to do so, and keep in mind from their perspective they may be less willing to do so as they have expended significant time in going through the eviction process.
If the sheriff does have to forcibly evict you, the landlord will provide movers and your property will be moved to the street curb and left there while the sheriff oversees the process. You will be responsible for the safekeeping of your property (any loss due to theft or weather damage is your risk, not the landlords).
You can try making a motion to the court to "stay the eviction" - but if the move out day was the 28th (Saturday), it may simply be too late - really this motion should have been filed immediately after the judgment was entered, and courts only grant the motion in extreme circumstances - such as an occupant with a significant medical issue that will be exacerbated by moving, and they will only grant a short continuance - such as 2 weeks.
Even if you get money together at this point, you cannot force the landlord to accept you back (assuming my understanding is correct and you are post-judgment). The landlord is entitled to possession and you need to find a new place to live.
Contact your local County housing authority and ask for emergency housing assistance, they can help you with placement and benefits.
See this link for more details and information on the unlawful detainer process in California: http://www.courts.ca.gov/selfhelp-eviction.htm