Opodo complaint: failed to provide alternative flight for 2 weeks

Our flight was for the 4th August cancelled with BA ( booked through Opodo), I was keep calling Opodo and contacting them through their chat to get an alternative flight. I talked to 7 different agents on the first week, every agent promised that I will get an update in 72 48 243 hours, NO ONE EVER CALLED ME BACK! When I talked the 7th Agents and requested the new flight for the 3rd August, I was told that I need to be patient as Opodo is still dealing with people who’s flight was booked for the 25th July and doesn’t matter how many times I call, I wont get help yet. ( that time there were still available flights for the 3rd August). I waited patiently for 6 days, when I called again ( as no one call me again) and I was told that the earliest available flight is the 7th August ( the earlier ones are fully booked). My family have to travel separately now, as I have a soliciotor appointmet for the 5th August, I had to by a new ticket with Wizzair for £170, the rest of the rest of my family will have to travel at night, as we got late flight instead of a morning flight ( landing at 00:45 am) my partner will travel with a 10 years old child, so they have to stay in a hotel even that night. Opodo Failed to provide us alternative flight even I was keep calling them.
The most upsetting is, when I submitted a claim form with Opodo, the answer was that my feedback is really important, nothing mentioned about the compensation I requested. I assume my claim is closed now.