Hi isomri

The code blow is default CSS of badge: 

.woocommerce .product .onsale {
    width: 60px;
    height: 60px;
    line-height: 60px;
    top: 5px;
    right: 15px;
    background: #00b19e;
    font-size: 16px;
    color: #fff;
    text-align: center;
    display: block;
    overflow: hidden;
    z-index: 100;
    position: absolute;
    -webkit-font-smoothing: antialiased;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -moz-background-clip: padding-box;
    -webkit-border-radius: 50%;
    -webkit-background-clip: padding-box;
    -moz-border-radius: 50%;
    -moz-background-clip: padding;
    border-radius: 50%;
    background-clip: padding-box;
    -webkit-transform: translate3d(20px,-20px,0);
    transform: translate3d(20px,-20px,0)
}

If you want to do any chanes. Please consider reading the article we wrote about how to use  'Custom css'

Thank you.

Hi isomri

You should have basic knowledge  on WP, HTML & CSS. We give support only on them usage and basic modification.

If you're looking for professional help in this matter, there's always someone available for such tasks on the WP Kraken or Envato Studio. Pricing and timeline are always straightforward there and that's the main reason for recommending those services.

Thank you.

Hi isomri

Its server issues maybe, ticket system is not our system, maybe there is any changes going on or any update.

Thank you.