you have a special kind of accent

I listened a few time to catch why your reading sounds special. You are very consistent to add an extra pitch for long vowls like [ei], [ai], some times in short [e] and [a] when you lengthened the vowls as in word "bad". With the consistent extra picth, your reading actually sounded sweet. I could recall US teenage star Milley Cyrus, who has very heavy accent of American South, but that accent going with her speeches is so sweet that the director wanted her to keep that way, since she once worked with a speech coach to learn Hollywood accent. There is another person in this forum, his accent made his reading sexy, so everyone enjoyed his reading.

Let us come back with my suggestion: practice diphthongs to ensue your tongue and mouth ending in right position may help you remove the extra pitch at the end.