If i am in the process of purchasing a condo and the sellers agent does not want to sell the tenant the condo, what can I do?

I'm sorry.  I am not sure that I follow your question.  If you have signed a binding purchase agreement, you have the right to proceed with the purchase.  If you have an option to buy, it may be conditioned upon your not being in default of the lease.  Being in the process of buying does not excuse you from paying rent until the closing occurs and a pending eviction for nonpayment of rent would impair your ability to get a mortgage.  The seller may be threatening eviction to get you to pay until the closing, or the seller may be using a default, or alleged default, to get out of an option the seller does not want to honor.  I would recommend getting the landlord paid current and, in the second situation, suing to enforce the option if the purchase price is fair.