* Wesleyan Assurance Society: This is a UK-based mutual life assurance company. Their contact information will be on their official website. You should search for "Wesleyan Assurance Society contact" on Google to find the most up-to-date details, including phone numbers, email addresses, and postal addresses.
* Another company: There might be a similar-sounding company, or you might be misremembering the name. If you have more information, like the type of service they provide (e.g., life insurance, annuities), that would help in finding the correct contact details.
In short, the best way to contact them is to search online for the specific company name followed by "contact." This will usually lead you directly to their official website, which will contain all the relevant contact information.