Dear Windjay,
First of all I would like to thank you for staying in Room Mate Anna during your visit to Barcelona. I hope you enjoyed your time in our beautiful city.
I feel sad about not fulfilling your expectation or needs in terms of the room size. The rate is always adapted to our hotel category, location and demand in the city (events, concerts, congresses etc). When the rate is non-refundable, we are not able to modify it but of course, when we can, we offer upgrades at a discounted supplement. In your case I do not know the exact dates you stayed with us but in our hotel we have high occupancies so I do not agree that the hotel was half empty.
Should you need any further information or assistance, I remain at your entire disposal.
Kind regards,