Payment request without statements

I received sms’s from Lancet for outstanding balances. Requested a statement from the e-mail address on file in order to sort payment with my medical aid to be covered from the Oncology side. I am not the account holder, however, I do all the payments on my husbands behalf that is sick with treatment at this stage. If the payments is not redirected to the correct department with our medical aid within 3 months, it will not be paid and I will not take responsibility for it.