Artwork problem

Contract I had for CellC artwork on my wall.It ended on the 28th of February 2026.I did let people who put it there,his name is John dont know the surname, that it expires they must come and remove it by painting my wall w white if they don't extend. The guy told me that he will send people to paint it white as it is not extended.I asked when.He said the 2nd week of March.i told him that while their artwork is on my wall i am going to miss out clients.He didn't respond.I called his boss and explained all this.His boss assured me that the contract will be extended,As soon as he receives confirmation he will pay me.It was on the 4th of March.I asked her about the payment,he changed that he won't make payment,will wait for an email from.CellC.i said but you promised to pay as soon as you get confirmation.He the said he will pay me on Monday the 9th of March.I inboxed CellC on Facebook.it was saturday the 7th they said they will look into the matter.I thought someone from CellC will call and tell me what happens now,No one called.I explained to them.that I depend on the wall,it is my only source of income they don't even care.The guy I spoke 2nd,told me that my payment wi be delayed even further I shouldn't have reported hi..I told him that today the 9th I want action.It is either he pays or come and paint the wall white and remove the artwork.Even if he removes the artwork he must pay me for this months I missed clients who would have paid me.Hope CellC takes this matter and let me know what happens from now.Thanks