If you're using Calcium plus D3, then you don't need UVB. UV is what enables reptiles and amphibians to produce D3, which is the vitamin they use to absorb the calcium. Have you regularly been giving them the Calcium supplement in their food? Have you been giving them vitamins? Make sure you're gut loading their feeders too with nutritious food. Try dubia roaches, as they're a very nutritious feeder. They're fairly easy to breed, too-just make sure they're legal in the state you live in.

In regard to the lighting, are you using LEDs or UVB bulbs? LEDs only provide visible light. You may want to consider upgrading their tank as a 10 gallon is a little cramped for two adult toads. I'd recommend a 20 gallon long tank they're easier to fine, but a 15 gallon tank is the minimum for two.

I hate to have to tell you this, but MBD isn't reversible unless it's very minor. You can only slightly lessen it and keep it from getting worse. Trust me, I know you're likely very upset with yourself as I was when a pet bullfrog I had got MBD. Don't be; things happen. It may not be MBD. Excessive calcium can have very similar symptoms, although you'd have to see a vet to be sure.

It may help to post some pictures so we can see exactly what you've mentioned.