Strange that the company your joining don't have ladies visa from the Philippines.If your transferring your sponsorship to a new company & also provided that you get a release from your previous sponsor, then no need for a new visa, the old visa will just be transferred to your new sponsor.What work visa you have will just be transferred, so if your work visa is a waitress then it will be same on the new sponsor. Worse scenario would be, that they change their mind in hiring you. Anyway, if your new visa will take time & you need to renew your old visa, just ask you old sponsor to renew it & the expenses to be paid by your new sponsor, that is if really they want to hire you.