Horrible experience !!!

I wish there wae a zero rating , Nimble has been on my case for my Woolworths account ,after finaling paying my account , Nimble is still calling me claiming that I'm still owing my Woolworths account I have sent proof of payments even followed up from side, I spoke to someone who advised that yes the funds are reflecting they just need to re allocate to Woolworths and that was on 13th yet on 14th someome else from Nimble is calling me asking me when am I paying my Woolworths account.What kind of pathetic service is this how is this company unable to see funds that I payed and just allocate to Woolworths and have my account closed ,this is unbelievable !