Contact Yahoo customer uphold in the event that you need to fix username issue in Yahoo Premium Services? A username is given to every client of the Yahoo Mail which is outstanding. In any case, on the off chance that you need to change your username, by then you can locate the fundamental advances expected to do as such in the DIY accounts. In the event that that doesn't help, by then you can examine to Yahoo Premium Services help site page with figuring out the issue. https://www.contactcustomerservice.net/blog/how-much-does-yahoo-premium-customer-service-cost/