Jealous of other wives

I am a woman married to a Muslim man who had three wives already and I am not happy with the current treatment I have received from my husband and his family. They treat me as less important than the other wives to the point that I feel jealous and depressed. My husband never seeks my opinion on our family matters. My sister-in-law even told me that there is a hierarchy of wives and I should not expect to enjoy equal rights with the other wives. This statement has disturbed my peace.  Is it true that there is a hierarchy of wives which creates varied rights among wives? Kindly enlighten me.
RS, Tanga

Section 57 of the Law of Marriage Act, [Cap. 29 R.E. 2019] is clear that for the avoidance of doubt, it is hereby declared that, subject to the express provisions of any written law, where a man has 2 or more wives they shall as such enjoy equal rights, be subject to equal liabilities and have equal status in law. This means according to law, there is no hierarchy of wives in a polygamous marriage unless a law specifically states so. Remember our answer is based on our law. However your religion and customs may have other provisions. If you are unhappy with your marriage, you may seek counselling or consult your religious leader for further guidance. If you have other legal questions on this matter, your lawyer can guide you further.