You need to contact Google support about the Maps API.
We do not control the query quotas or referrer restrictions. It appears you have not obtained the correct Google MAP APis r are using the referrer restriction incorrectly
if you add an IP referrer you MUST have a google geocoding API as well.
https://docs.storelocatorplus.com/blog/google-server-key/
https://docs.storelocatorplus.com/blog/google-geocoding-browser-keys/
js?libraries=geometry&language=en®ion=UK&key=AIzaSyBsLTvNNUwMnD5LYX7mEfe1oW_tmXEoXZw&ver=4.9.21:66 Google Maps JavaScript API error: RefererNotAllowedMapError
https://developers.google.com/maps/documentation/javascript/error-messages#referer-not-allowed-map-error
Your site URL to be authorized: https://kaymed.co.uk/find-stockist/
_.Gc @ js?libraries=geometry&language=en®ion=UK&key=AIzaSyBsLTvNNUwMnD5LYX7mEfe1oW_tmXEoXZw&ver=4.9.21:66
px.owneriq.net/stas/s/sholic.js:1 Failed to load resource: net::ERR_BLOCKED_BY_CLIENT
i.simpli.fi/dpx.js?cid=66111&m=0&sifi_tuid=37828&referrer=https%3A%2F%2Fkaymed.co.uk%2Ffind-stockist%2F:1 Failed to load resource: net::ERR_BLOCKED_BY_CLIENT
cdn.tynt.com/afsh.js:1 Failed to load resource: net::ERR_BLOCKED_BY_CLIENT