BILLED REPEATEDLY FOR 1 CENT!

I wish I didn't have to put 1 star! After being a loyal customer for almost 10 years and always paying my invoice on time, I now have the headache trying to get rid of you. Firstly I cancelled in Feb, which was not done immediately and I struggled to cancel, getting invoice after invoice. This eventually stopped until last month. Now I am getting invoices again for the amount of 0.01c!!!!!!!!!!!!! One cent!!!!!!!! I just received another one. Even states overdue for more thatn 90+ days! This is ridiculous! PLEASE STOP THIS NONSENSE!