Second promised refund — still no money

This is now the second time Limango has claimed that my refund was processed.
After more than a month of waiting, Limango eventually admitted that the first refund had actually failed, despite previously telling me that it had been sent and repeatedly directing me back to my bank.
On 12 August, I was informed in writing that the refund had been processed again and that €41.64 would reach my bank account within 7 business days.
Those 7 business days have now passed. I still have not received the money.
I have repeatedly contacted customer service and have already provided screenshots from my bank confirming that the refund was never received. I contacted Limango again after the promised 7-business-day period, but I have received neither my money nor a meaningful response.
It is unacceptable that a customer has to spend this much time chasing a refund of €41.64 that should have been returned more than a month ago.
I will now be taking this matter further through the appropriate consumer protection channels.