If someone is violating a court injunction and attempting to forcefully evict you from a property you've paid for, you have legal recourse. You can file a case under Section 145 CRPC, which deals with disputes likely to cause a breach of peace. If the police are not acting on your FIR, consider approaching the High Court for directions to ensure your protection. It's also advisable to consult a legal expert regarding executing the sale deed and gathering evidence of payment.