I Bought A Blacklisted Phone On Amazon. If you don't mind Help!

Hi house. I purchased an utilized telephone on amazon.
 When it touched base here in Nigeria and I put in my sim it didn't work. I checked online and the imei has been boycotted by t-portable. If it's not too much trouble is there any answer for this issue? Will I open it or have the imei changed? I can't give back the telephone on the grounds that the expense of delivery it back is high. If it's not too much trouble house I require pressing help so this telephone doesn't swing to a waste. Much obliged.

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