Hacking into g-mail and changing quote acc nr's

IA certain person is hacking into my Gmail account and intercepting quotes whereupon he/she changes MY business banking details and ******** clients to pay into ABSA account nr ***...Branch code 632005. This has happened twice in one week. Luckily the second time my client payed into the correct account. This person then tells the clients from MYGmail account that the account details have changed and that the deposit should go into aforementioned account.<br> <br> My other client payed R9000.00 into that **** account and now stands the chance to lose that money.<br> <br> I however went so far to change all my Gmail passwords and added a double verification code which has to be entered after receiving it via my mobile nr.<br> <br> Please let me know what can be done to catch this *******. E-mail me on [Email Removed]<br> <br> Regards<br> Francois Groenewald