A landlord is seeking advice on how to proceed after a tenant stopped paying rent and issued a legal notice with unsubstantiated claims. The landlord has drafted a final notice requesting specific documentary evidence from the tenant within 15 days to support their claims regarding renovations and repairs. Failure to provide this evidence will be considered a refusal, potentially leading to the termination of the tenancy. The landlord also advises the tenant to seek legal counsel for drafting such notices.