Very slow payers, you have to beg for your payment. Happened to me several times. Not pleasant to beg for pay for jobs they obviously were paid for.
The person to contact at Service Savvy about payment is Vincent Amendola at firstname.lastname@example.org
When I contacted him recently about shops I submitted in January & February 2020 but which hadn't been paid, he wrote: "At this time due to our clients closing their businesses, we have not received payment for February or March invoices. We are simply out of funds. As soon as we get paid from the client, we will reimburse you."