Rear main seal leak volvo 1990 740gl?

take it to a good shop let them tell you exactly whats wrong and cost ask friends ,family,neighbors for a shop that wont rip you off at this point you dont know what your ex did to the car he dosent sound like a mechanic or if he is he's not a good one when they tell you whats wrong you can Weight fixing it or if you have the budget of getting a new /used car good luck