RF24 library trouble with available

myfile .ino

   nrf24.startListening();
   Serial.println("waiting..");
   unsigned long started_waiting_at =millis();
   bool timeout=false;
   while ( ! nrf24.available() ){                             // While nothing is received 
      if ((millis() - started_waiting_at) > 5000 ){            // If waited longer, indicate timeout and exit while loop
          timeout = true;
          break;
      }else
          timeout=false;
    }
     if ( timeout ){                                             // Describe the results
        Serial.println(F("Failed, response timed out."));
    }else{

   Advertise a;
   uint8_t len= sizeof(a);

    nrf24.read( &a, len );
      
   Serial.print("Dev ID: ");
   Serial.println(a.dev_Id);
   Serial.print("Token ID: ");
   Serial.println(a.token_Id);

   Serial.print("Adv type: ");
   Serial.println(a.adv_type);
  //just to ensure that location is cleared
  a.dev_Id=0;
  a.token_Id=0;
  a.adv_type= 0;
  }
 Serial.println("___________has the buffered erased?____________");
   Serial.print("Dev ID: ");
   Serial.println(a.dev_Id);
   Serial.print("Token ID: ");
   Serial.println(a.token_Id);
   Serial.print("Adv type: ");
   Serial.println(a.adv_type);
  Serial.println("___________are all of above zeroed?____________");
  
 Serial.print("nrf available test: "); Serial.println(nrf24.available()); //returns true once it returns true :(
 Serial.print("timeout :");
 Serial.println(timeout);
nrf24.stopListening();// thought this would clear rx buffer :(