Bootloop After Editing Build.PROP

Hey everyone! I bricked my lenovo A5500-H after editing the davlik vm heap size to 1024m! I forgot my limitations . Anyway i want to know what id go about doing now. I need to reflash anyway so if anyone could give me the(and this is the thing) the a5500-HV firmware so i can make calls. I'd also like a step by step tut because the only thing ive ever reflashed is a Samsung S5300 and that was like three years ago XD.
Thanks