Is everything going smoothly with the e-extension process these days? ☹️

I've been trying to complete the visa e-extension through VFS since Friday, but the payment isn't going through successfully. The valid end date is August 12, which falls on a holiday, so I'm worried that I might only be able to extend it by August 9. If the e-extension doesn't work out, would it be possible to extend it through a walk-in process?

I've already done a 2-month TR extension, two times walk-in extensions, and one e-extension. If I have to do another walk-in extension, will there be any penalties? I'd like to know more about this.