I have upgraded via bank transfer, but the credit has not been added yet.

A bank or wire transfer is the only payment method that is not processed in real-time. Therefore, it takes an average of 3 to 5 business days before the credit is added to your account. (Unfortunately, we cannot speed this up. Please use a different payment method if you are in a hurry.)

Whenever you transfer money, it's very important that you include the correct payment reference with the transfer. Without this reference, the payment can't be matched to your account. (We won't be able to do this manually, because the payment is processed by our payment provider: Mollie.) In case this happens, they will return the money to you automatically within 2 business days. See this page for more details: https://help.mollie.com/hc/en-us/articles/360035730494-I-used-the-wrong-payment-reference-in-the-bank-transfer-what-now-