Horrible Service

if there was a option for lower than 1, i would select that rating, Ampath has been sending me bills continuously. i have made an online payment on their website, provided by bank statement as proof, sent endless emails but yet i am still being sent a bill as they cant pick up payment on their side. they have requested proof of payment which i provided, i have even sent my bank statement but yet its nit good enough!!!! please stop sending me bills as i have paid you guys!!!!!!