Service from the alleged top provider

I have had an Afrihost Internet account, without problems, for many years. Sadly disaster struck when I gave two change Instructions. The first Instruction when I gave more than a calendar months notice during October for my service to be relocated effective 1st December. The transfer was activated about three weeks after the date required.

Te second disaster was that Afrihost failed to update my payment instruction, acknowledged receipt and now are sending letters threatening to suspend my service.

I believe that Afrihost was given plenty of notice to update my service requirements. Is this an acceptable service standard set by a company reputed to be number one?