E-Mail support Shopify store

I run an online store selling health-related supplements to customers in the USA, UK, Canada, Australia, and New Zealand only. We promote via Facebook ads and handle all customer support through email.
We need a reliable, friendly English-speaking Virtual Assistant to manage our customer support emails full-time or part-time (20–40 hours/week to start). The role is 100% email-based—no phone, live chat, or social media required.
Main Responsibilities:

Read and respond to incoming customer emails within 24 hours (we aim for fast replies, often same-day).
Handle common inquiries: order status updates, shipping questions (7–10 days average delivery), returns/refunds (unopened items, 30 days, customer pays return shipping), payment issues.
Answer general product questions: Explain item sizes, general usage guidelines, quality assurances (third-party lab tested), discreet shipping, etc.
Strictly follow compliance rules: Never give medical advice, never make health or treatment claims. Use standard phrases such as: “We are not doctors and cannot provide medical advice. Please consult a healthcare professional and do your own research.”
For questions about potential benefits or uses: Politely mention that some customers have shared positive experiences in reviews, but emphasize we cannot make claims and recommend doing their own research or consulting a professional.
Escalate complex complaints, legal issues, or disputes to the owner.
Occasionally mention bundle options when relevant to the conversation.
Use provided response templates/FAQs when they apply (shared during onboarding).
Maintain a friendly, empathetic, and professional tone in all replies.
Flag recurring issues or patterns for the owner to review.

Required Skills & Experience:

Excellent written English (clear, polite, natural responses—no grammar errors).
Previous experience in email customer support, e-commerce support, or virtual assistance (health/supplement/online retail experience is a plus).
Comfortable handling sensitive topics with strict compliance (disclaimers are mandatory—no exceptions).
Reliable, detail-oriented, and able to work independently.
Familiar with Gmail or similar email tools; basic Google Sheets/Drive for notes if needed.
Available in a timezone that overlaps reasonably with US/UK/AUS (flexible, but quick responses are important).

Nice-to-Haves:

Experience with e-commerce platforms (Shopify, WooCommerce, etc.).
Understanding of health product disclaimers and regulations.