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@AYasir Greetings

I have checked the link profile of your domain. It seems like someone is intentionally making spammy backlinks for your site.

Solution is to you the disavow tool, & sumbit it to google.

I hope this will solve your problem.

Another tip for you is Adjust the header alignment in your website, it will looker better.

To increase the Domain Authority of a website, you can follow these methods:

Get Quality Backlinks with Link-Worthy Content: Creating link-worthy content like case studies, step-by-step guides, original research, and infographics can help attract high-quality backlinks, improving your Authority Score

Improve Off-Page SEO: Enhance your off-page SEO efforts by focusing on the quality of your website's backlink profile

Create Valuable Content: Developing engaging and informative content that provides real value to your audience is crucial for improving Domain Authority. This includes creating blog posts, how-to guides, and infographics

Build High-Quality Links: Focus on acquiring backlinks from high-quality, relevant, and authoritative websites to boost your Domain Authority

Increasing Domain Authority is a gradual process that requires time and effort. By implementing these strategies consistently, you can enhance your website's authority and improve its rankings in search engine results.