Refused to fix my iPad

They refused to fix my iPad because the screen has been replaced by a different service provider previously. Replacing screens is a service Apple offers in other countries, but not in SA. Now I am penalized for using another supplier for a service they do not offer in SA. You are therefore forced to buy a new iPad rather than just pay to have your product fixed. In the process they are abusing our insurance system and bullying a smaller business who is offering a service that they are not willing to offer in SA.