Great sound when it worked

After a month in a controlled environment the monochord pegs wouldn't tighten. After inspection discovered the wood had a crack from side to side where the pegs were. I removed 1/2 the strings so I could still use it. Yesterday on the other side the same thing happened. The entire line where the pegs are cracked making for an instrument that cannot be tuned. I am not happy and ask Thomann to make good with returning this. I purchased 5 monochords. Now I pray the other 4 don't give me problems.