cannot allocate my payments

I am a new customer, and have paid all my invoices when I get them, using the payment reference number supp**** by Metrofibre. However Metrofibre has not allocated these payment to my account and keeps sending me threatening emails about non payment.

I have on two occasions spoken to people in the finance department who have on both occasions assured me it is sorted out and my balance is zero.

Yet I got another mail last nigh telling me they will suspend my service.

Metrofibre please get your finance team to wake up and do their job.