What did if someone did false compalint against me from bank

Sir ek insan ne mujhse online assets khareedi or usne payment Kari or fir usne mere uppr jhoothi fraud complaint krdi jiski wajah se mera bank account freeze kr diya gya hai..bank wale kah re h samne wale se kaho case withdraw kare jab ki mere paas uski koi details nahi hai ...or maine bank ko payment kyu receive Kara uska proof bhi diya hai..tab bhi mera account ni unfreeze kr re h please mam guide kr dijiye Mai kya Karu kaise apna account unfreeze karae plzz sir🙏🙏