False accusations of non-payment

I battled to pay my account the beginning of the year, but was up to date before May as promised (the final payment that brought me up to date was paid by my hubby at the Shelly Center Truworths branch - R350 extra). The last two months I have been accused of not paying my account when in fact I sent them the proof of payment on both occasions. And then was argued with via email stating that I have not paid in full - if your people allocated and did their jobs they would see that I am up to date and I would not be receiving threatening sms's and emails. Please check on your side and sort out your accounts and stop sending me these messages. Once my account is paid up - I will take my business elsewhere as I am sick of being treated like a ********.