I just also tried deleting and disabling the OPcache with my hosting and really nothing works. It still shows the old logo.
Thanks for your help.
Please always attach a link to your website so we can check it out. If the page is offline(localhost), then our help will be limited. You will have to contact us when the page is online. Also, please make sure that the page is not under maintenance before you provide us with the link.
It is always a good idea to also attach a screenshot showing your issue.