Urgent assistance

Hello, please I am in need of advice/assistance about my Nigerian passport. I was deported from the uk for overstaying in 2016 and I was deported back to Nigeria via chartered flight and my passport was given to Nigerian immigration, I was told it would be sent to me but not seen it since and I have tried to apply for another passport 3 times. I go through even up to the capturing stage but when time for printing my passport I keep getting told my name is in a ban list. Please I really need assistance and it’s been 9 years I was deported.