Son has account with KBC - he received multiple phone messages in May this year to phone the bank. When he did phone back, the bank claimed the calls were not from the bank. When he asked them to check again, they reverted to say he should provide an ‘in bound’ call list. His mobile provider says they do not provide this. What should he do - as he’s worried it was some ‘phishing’ type effort. The number displayed was the bank’s number.