Update & Conclusion
Our requests and efforts to resolve this have not been addressed or acknowledged! My two letters to Fluffs Saddlery and its owner, Jessica Firth, formally notifying her of my termination of representation of her saddlery because of several breaches of contract on her part were returned to me. The first letter was sent to the address indicated on Fluffs Saddlery's invoice itself. The second was sent to an address Jessica Firth commonly mentioned in her Facebook posts. Both letters failed to reach their intended recipient, Jessica Firth.
Fluffs Saddlery's website does not disclose any business contact address (see https://fluffssaddlery.weebly.com/contact.html). This means that customers do not have a mean to get in touch with Fluffs Saddlery other than by email, Facebook comments and whatsapp messages which are usually ignored. It is impossible to send a formal notice to Jessica Firth and Fluffs Saddlery. To my understanding, this constitutes a violation of several consumer protection laws in countries where Fluffs Saddlery seeks to attract customers.
I therefore reiterate my recommendation not to purchase any item from Fluffs Saddlery.