Terrible service

I have had the worst experienced with Nimble group for the past month . My Edgars account was handed over to Nimble group a couple of months ago and ever since , I have been consistently paying my account however they changed their payment options from EasyPay to Pay@ and failed to notify me in due time . Only a couple of days after my last payment on the 27th of December 2020 did I receive notification of the new payment method and ever since , I have been struggling to get the payment allocated . I have emailed the proof of payment numerous time , called , emailed and all I’m getting is them telling me time and time again that they are escalating and re-escalating the matter but this never gets done . A month later , the payment has still not been allocated and my account accumulating interest as a result . Not to mention the consultants calling me a couple times a day to remind me of my outstanding balance which Has still not been updated !