Refund after more than 6 months???

[mopske]

Today, when i checked my balance on CS, i found a negative balance.

When i looked into my sales history, i found that they refunded an EL that was bought in the month June (my only EL there so far). 
It's not the first time that they refunded a sale, but after more than 6 months??? Come on, this is ridiculous!

Someone else had the same?