Payment update.

I have a truworths account ***.When i make my payments, i logg into my online profile and i make a card payment so the payment can reflect immediately. Yesterday my outstanding balance was R1852.94 and purchasing amount was R697. My installment was R410. So as usual i logged into my profile, made the payment and it went through and it was updated. New balance was R1442.95 and purchasing balance R1107. This morning when i logged on my profile to purchase something, my balance was R1852.95 and purchasing amount back to R697 and its like i never made the payment. I called customer service they said i must email proof. I did, but they are telling me to call customer service. This never happened before.. I have this account almost a year and i always use the same method of payment which reflects immediately. Im sorry but if this is a stunt to get me to pay twice, that will never happen!