The Testimonial & Rating like used on https://www.clubtaxi.nl/taxi-amsterdam-schiphol.html does not get crawled by Google bot. Each time I create a script that passes the test on https://validator.schema.org/ like the latest: 

<script type="application/ld+json">
{
"@context": "http://schema.org",
"@type": "Review",
"itemReviewed": {
"@type": "TaxiService",
"name": "Taxi Amsterdam Schiphol"
},
"reviewRating": {
"@type": "Rating",
"ratingValue": "9",
"bestRating": "10"
},
"review": {
"@type": "Review",
"datePublished": "2021-11-16",
"reviewBody": "Heen en terug met reis tussenstop was perfect geregeld. Clubtaxi ga ik zeker vaker gebruiken.",
"author": {
"@type": "Person",
"name": "Rudolf"
},
"publisher": {
"@type": "Organization",
"name": "Klanten Vertellen"
}
}
}
</script>

It gets rejected by Google as faulty. Reason as I understand the Item Reviewed is not a thing. Anybody a suggestion how to solve this matter, eying on the result that what is in the box Testimonials & Rating gets crawled. Thanks in advance