אי התאמה ביו פתולוגיה של ביופסי לpetct

Diagnosed 1 year ago with bladder cancer tcc t1 hg with cis.
Started lamm protocol.
Two monthes ago another turbt and
This time tcc ta hg with cis, during
Turbt small hole in bladder wall
And catter inseret ant give me AB.
10 days after release from hospital
Did petct that came to be tcc invade
To fat layer stage 3 or 4 BC.

so pet ct say stage 3 or 4 and biopsy say stage ta.

My question is what to do next?
One doc sayed need to wait 3 monthes and perform another petct, the other
Sayied need to do re satge turbt first and then we will decide what next.

What is the best chioce?

Thank you alot