Well I must say you have a top notch qualification, but hope you know that they are a lot like you also in the labor market if not some with beta qualifications looking for the opportunity you are seeking...so I will say job hunting requires persistence and patience.
Also, will suggest you should also try online means making unsolicited applications, I know coy's like shell, mobil, addax and d likes allow it, this is a safer and beta means of applying dan paper document which can be misplaced or torn b4 the vacancy arise (though dat those not mean paper CV don't work)
Lastly, keep on praying to your Baba God the giver of all job and for the mean time find something doing either extra professional certification or a little job not to create a wide gap in your CV and also improves your chances....Less I forget keep a constant check on career sites like , ngcareers etc and in due time your blessing shall come in Jesus name