Domain blocked on BT ISP in UK

Job ID: 31101086

Budget: £250 – £750 GBP

Hi there,
We have recently detected that our domain is being blacklisted and marked as unsafe by ISP BT (British Telecommunications) company. Due to this issue, many customers can not access our website.
Our website is www.smart-light.co.uk
Hosting: Siteground
Platform: Woocommerce
Security monitoring: Sucuri
Cloudflare firewall

We need a throughout investigation. We would like to hire a specialist that has been dealing with this kind of issues in the past.
Please note that we have already been trying to solve with our Developer, and support from tools mentioned above without success.
Related categories: PHP Web Security WordPress Website Testing Web Hosting