Phone number 1800 054 378 was attached/provided in online bank transaction details - purporting to be a PayPal transaction and PayPal support contact details, but fairly noisy environment, so most likely a scam call centre. Convincing, in that it puts you through all of the PayPal menus before finally reaching a "support officer". Associated with a fraudulent transaction supposedly made to Uber via PayPal; when such PayPal account was totally unknown/non-existent to bank account holder.