Sorry to hear that! But please don’t worry. Let us explain: UK customers whose orders are shipped with UK Mail will only be able to track their order once the package arrives in the UK - this might take 48 hours from the time of shipping.
UK Mail will send you your tracking number by email and text message as soon as your order reaches the UK shores. So please do not worry if you don’t receive a tracking number within the first few days after the order: the shipment is still being processed correctly!