If used correctly, splitting of condoms is rare. Use a new condom every time you have sex, be careful when opening the packet as not to tear it with fingers or jewellery and make sure it is in date!
Condoms still provide the best protection against STI’s and using one is safer than not using them at all. Combining the pill and using a condom will not only give the best contraception protection it will also protect against STI’s which the pill won't.