Is it legal for a married American man and a Philippine lady marry in Saudi Arabia under muslim rites.?

My American husband deserted myself and our son in the in UK. We eventually hoped to join him there but when I got ill he refused any contact, blocked our emails and changed his phone number. I eventually found out that he had died in 2006 in the Philippines not long after he moved there He served 21 years in the US Forces and I am still named as spouse on his Military record. We were married in the UK in 1984 and had to prove we were free to marry before we got married via our divorce papers as we were both previously married. I have found out that he married a Catholic lady from the Philippines under Muslim rites in Saudi Arabia in 2005. We were never divorced. The lady he married knew he was still married to me. I could not get a copy of his death certificate because this lady made a claim for death benefits (which she never received) and the VA refused to believe me, were extremely unhelpful and rude and would not give me any details of how, when and where he died, yet other government departments acknowledge me fully. This has been a nightmare for me. I only managed to get a copy of the death certificate by luckily finding a city in the Philippines endorsed on the back of a check and writing to their vital statistics office and making an enquiry. Because he died so long ago the house we owned for 20 years was auctioned because I did not know of his death as I was living in the UK. The mortgage company hired a legal firm who have recently told me that with all their fees and interest since 2006 and the low price they received for the home there was nothing left over. Everything we ever owned which was in storage in the US was also auctioned for $1500 because I did not know of his death and they tell me there are thousands of dollars owing in unpaid storage fees. He did not tell anyone where I could be found or forward me any information. I now have to pay off the credit card that he used while in Saudi and Keesler are making me pay interest and finance charges from the date of his death in 2006 yet I did no know he died till 2010 even though never used the card. It seems that my husband had been very deceitful, he did not inform anyone of where he was or of his bigamous marriage. I would like to know where I stand in this. I don't have funds to hire lawyers. Is this Saudi marriage legal.