In certain circumstances where you are having difficulty getting credit due to a low score you might need to consider getting secured credit. Secured credit is where you have some form of collateral as security for the money borrowed.
An example of this would be a loan where you use an asset such as a house or some other form of asset that is of a value that the lender will be able to recover their money from the sale of.
Usually you will have to pay a higher rate of interest when you need to get a loan like this but for the time being when you need to get such a loan you should consider it as a stepping-stone that will lead to the repair of your credit score.
If there are no suitable assets to use as collateral it might be possible to get a family member or friend to offer something suitable if they trust that you will be able to make the payments on the loan and clear the debt.
The loan doesn't need to be very big and in fact the smaller the better initially as it will give you the opportunity to start the repair of your credit score while not burdening you with excessive interest payments on the small amount of principal.
Once you have done this, or maybe after you have done this a few times you will have the opportunity to get a non secured loan to further advance your credit score rebuilding process.
Obviously you will try to get unsecured loans initially but this allows you another option when you might consider all is lost and you will need to take some form of action to get back on your feet again.
Lenders will also be happy to see that you have been making a concerted effort to repair any damage that has been done in the past and this can have a positive effect on any applications you make for more credit.