Puma za pathetic online service....always no stock.

Totally disappointed after 3 online purchases from puma website have all been refunded due to no stock. I have purchased 2 sandals that were on special on the 12th January 2021. On the 13th Janruay 2021 I have received an email stating "Unfortunately due to unforeseen circumstances, we were not able to fulfil all of items in your shopping cart, as indicated below. We sincerely apologise, you will be refunded within 10 Working Days for any items we could not fulfil. Please don't hesitate to contact us if required." I have also purchased items on the the 15th and 16th January 2021 which have all ended with this refund email as stated above. I am very disappointed as I have lost all the purchases that were on special and this website issue has been going on for over 1 week now. How can a big brand like puma have such a pathetic online stock system. If an item is sold out it should be removed from the website. You cannot be taking peoples money and then sending them an email after 1 business day stating that there is no more stock. This issue needs to be resolved ASAP as you will be losing many more customers. Lastly from what I have read this is not the first time this exact same issue has occurred.