Stopping the squealing noise when accelerating depends on the type of problem. This is why you should figure out the exact reasons why the noise is coming from the belt. After diagnosing the specific reasons, take the necessary steps accordingly. If the noise is caused by the misaligned belt or tensioner align them correctly. But if the problem is in the installation, hire an expert mechanic to do the mounting task. All in all, check the whole part related to the belt and then take a decision. It is also appreciable to change the belt and other parts if you have no problem spending extra bucks.