As has already been stated, if tracking doesn't show as delivered then payment will be released 14 days after the date of sale.
The 30 day payment hold for new and returning sellers now only applies to Business Sellers.
Looking at your sold items you should soon be eligible for faster payments (usually within 24 hours of the buyer paying). The eligibility criteria for that is 10 or more sales with a total value of £150 or more within the last 5 years, no more than 2 currently open requests/cases, and no more than 2 transaction defects within the last 12 months.